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# IET Communications

## Filter Results

Displaying Results 1 - 25 of 30
• ### Balanced counting bloom filters: a space-efficient synoptic data structure for a high-performance network

Publication Year: 2012, Page(s):2259 - 2266
| | PDF (388 KB)

A Bloom filter is a simple space-efficient randomised data structure allowing membership queries over data sets. It is widely utilised in peer-to-peer network, traffic measurement and distributed systems. Aiming at the deficiencies of the naïve counting Bloom filters (NCBFs), a novel data structure called balanced counting Bloom filters (BCBFs) is presented. In order to achieve space-effic... View full abstract»

• ### Improved transmitted reference pulse cluster scheme for ultra wideband communication systems

Publication Year: 2012, Page(s):2267 - 2273
| | PDF (779 KB)

In this study, from a more practical point of view, the authors develop an improved transmitted reference pulse cluster (iTRPC) scheme. Based on a recently proposed transmitted reference pulse cluster (TRPC) structure, each pulse cluster is broken into reference pulse clusters (RPCs) and data pulse clusters (DPCs). It is observed that by inserting a number of zeros at the end of each RPC and each ... View full abstract»

• ### Data rate selection for efficient broadcasting in ad hoc networks

Publication Year: 2012, Page(s):2274 - 2277
Cited by:  Papers (1)
| | PDF (415 KB)

The required transmission time decreases as the data rate increases on a single link. When broad-casting in an ad hoc radio network, this may not be so, as the number of retransmissions may grow as the data rate increases because of decreased transmission range. Moreover, there is often a non-trivial optimum. To resolve the problem of selecting an appropriate rate in such a network, the aut... View full abstract»

• ### Game-theoretic approach for interference management in heterogeneous multimedia wireless personal area networks

Publication Year: 2012, Page(s):2278 - 2286
| | PDF (610 KB)

Emergence of new wireless technologies has facilitated the way to higher data rates and more robust communication links. Ultra wideband (UWB) is one of these promising technologies that, despite its several outstanding benefits, can cause interference to other networks operating in the same frequency range because of its large bandwidth. In this study, the authors introduce a solution for interfer... View full abstract»

• ### QoS-guaranteed IP mobility management for fastmoving vehicles with multiple network interfaces

Publication Year: 2012, Page(s):2287 - 2295
Cited by:  Papers (1)
| | PDF (592 KB)

In this study, the authors present a quality-of-service (QoS)-guaranteed IP mobility management scheme for fast-moving vehicles with multiple wireless network interfaces. The idea of the proposed mechanism consists of two things. One is that new wireless connections are established to available wireless channels whenever the measured data rate at the mobile node drops below to the required data ra... View full abstract»

• ### Phase locked loop assisted phase tracking in asynchronous-code division multiple access systems over slow fading and time-varying channels using simplified expression for improved Gaussian approximation

Publication Year: 2012, Page(s):2296 - 2305
Cited by:  Papers (1)
| | PDF (1104 KB)

In this study, a simplified expression for improved Gaussian approximation is considered to model multiple access interference in an A-code division multiple access system. Punctured convolutional codes, which are one of the subclasses of convolutional codes, are employed to provide error protection to the information transmitted over the wireless channel. A detailed theoretical analysis is carrie... View full abstract»

• ### Transmit precoding scheme for inter-carrier interference suppression and path diversity in fractional sampling-orthogonal frequency division multiplexing (OFDM)

Publication Year: 2012, Page(s):2306 - 2313
Cited by:  Papers (1)
| | PDF (555 KB)

Fractional sampling (FS) has been investigated to achieve path diversity with a single antenna in an OFDM system. However, in the FS-OFDM system, it is necessary to oversample a received signal and it leads to large power consumption in a small terminal. To shift the signal processing burdens for FS from a receiver to a transmitter, a precoded transmit path diversity scheme in OFDM has been propos... View full abstract»

• ### Different perspective and approach to implement adaptive normalised belief propagation-based decoding for low-density parity check codes

Publication Year: 2012, Page(s):2314 - 2325
Cited by:  Patents (1)
| | PDF (558 KB)

In this study, the authors propose an improved version of the min-sum algorithm for low-density parity check code decoding, which the authors call adaptive normalised BP-based algorithm. Their decoder provides a compromise solution between belief propagation and the min-sum algorithms by adding an exponent offset to each variable nodes intrinsic information in the check node update equation. Th... View full abstract»

• ### Theoretical framework for quality of service analysis of differentiated traffic in 802.11 wireless local area networks

Publication Year: 2012, Page(s):2326 - 2334
Cited by:  Papers (2)
| | PDF (578 KB)

In this study, the authors provide an analytical framework to assess network-level quality of service (QoS) measures for differentiated, non-saturated traffic in infrastructure-mode 802.11 wireless local area networks using the distributed coordination function access mechanism. The authors build on a general analytical framework that takes into account the medium access control (MAC) access mecha... View full abstract»

• ### Beamforming and positioning-assisted handover scheme for long-term evolution system in high-speed railway

Publication Year: 2012, Page(s):2335 - 2340
Cited by:  Papers (9)
| | PDF (247 KB)

As the railway industry expands and trains speed-up, the reliability and efficiency of wireless communication systems in high-speed railway have to face the severe challenges. The high-speed brings about more severe Doppler effect, the postponement of handover triggering location and more frequent handover. Therefore the influence caused by the high-speed decreases the reliability of wireless comm... View full abstract»

• ### Doubly multistage decoding of low-density parity-check codes over Z2m

Publication Year: 2012, Page(s):2341 - 2350
| | PDF (704 KB)

A doubly multistage decoder (DMD) for low-density parity-check codes over Z2m, m>;1, which fuses the multistage decoding approaches of Armand et al. and Varnica et al., is proposed. Two variants of the DMD are considered. The first (respectively, second) performs belief-propagation (BP) [respectively, offset min-sum (OMS)] decoding in each de... View full abstract»

• ### Parallel interference cancellation with different linear equalisation and rake receiver for the downlink MC-CDMA systems

Publication Year: 2012, Page(s):2351 - 2360
Cited by:  Papers (2)
| | PDF (1477 KB)

The multi-carrier code division multiple access (MC-CDMA) is becoming a very attractive multiple access technique for high-rate data transmission in the future wireless communication systems. MC-CDMA systems transmitting over multipath channels suffer from inter-symbol interference (ISI) and multiple access interference (MAI). Recently, MC-CDMA with equalisation has attracted much attention for it... View full abstract»

• ### Additive statistical modelling of land mobile satellite channels in three-dimensional scattering environment

Publication Year: 2012, Page(s):2361 - 2370
Cited by:  Papers (1)
| | PDF (699 KB)

A new channel model with additive complex envelope process for land mobile satellite channel is proposed. The two fading processes, small-scale fading and shadow fading, are represented with Nakagami-q and lognormal distribution, respectively. Exact analytical expressions of first- and second-order statistics are derived for the proposed model. For the purpose of normalisation of second-ord... View full abstract»

• ### Block diagonalisation-based multiuser multiple input multiple output-aided downlink relaying

Publication Year: 2012, Page(s):2371 - 2377
Cited by:  Papers (1)
| | PDF (382 KB)

A novel block diagonalisation (BD)-based Multiuser multiple input multiple output (MU-MIMO)-aided relaying scheme is proposed for downlink transmissions, which does not require any channel state information at the base station (BS) and decomposes a MU-MIMO-aided relaying system into several parallel single-user MIMO-assisted relaying schemes. Furthermore, based on the proposed algorithm the optima... View full abstract»

• ### Phase ambiguity mitigation for per-cell codebookbased limited feedback coordinated multi-point transmission systems

Publication Year: 2012, Page(s):2378 - 2386
| | PDF (624 KB)

Limited feedback techniques, that employ codebook-based quantisation, are used in coordinated multi-point (CoMP) transmission to convey the channel direction information between the mobile user and each base station in the cooperative set and also among the cooperating base stations. However, unlike single-cell multiple-user multiple input multiple output (MU-MIMO) systems, CoMP systems face addit... View full abstract»

• ### Capacity and power allocation for spectrum sharing in cognitive radio systems under unknown channel state information and imperfect spectrum sensing

Publication Year: 2012, Page(s):2387 - 2394
Cited by:  Papers (1)
| | PDF (510 KB)

Cognitive radio is a technology with tremendous potential for more efficient utilisation of the radio spectrum. Based on the available network side information to the secondary user, three transmission models are proposed in the literature: the underlay method, the overlay method and the hybrid` method. The authors study here the capacity and power allocation for the hybrid method. In particu... View full abstract»

• ### Device-free localisation with wireless networks based on compressive sensing

Publication Year: 2012, Page(s):2395 - 2403
Cited by:  Papers (10)
| | PDF (515 KB)

A compressive sensing-based approach to solve the problem of tracking targets in the deployment area of the wireless networks without the need of equipping the target with a wireless device has been proposed. We present a dynamic statistical model for relating the change of the received signal strength between the node pairs to the spatial location of the target. On the basis of the model, the pro... View full abstract»

• ### Characterisation of highly absorbent and highly reflective radio wave propagation environments in industrial applications

Publication Year: 2012, Page(s):2404 - 2412
Cited by:  Papers (3)
| | PDF (716 KB)

Experience has shown that Bluetooth, Wireless LAN (WLAN), Digital Enhanced Cordless Telecommunications (DECT) and other Industrial, Scientific and Medical (ISM) frequency band wireless technologies developed for office use, have encountered problems when used in critical industrial applications. The development of more reliable wireless solutions requires extensive knowledge of industrial environm... View full abstract»

• ### Capacity maximisation in eigen-multiple-input multiple-output using adaptive modulation and Reed-Solomon coding

Publication Year: 2012, Page(s):2413 - 2424
Cited by:  Papers (1)
| | PDF (622 KB)

Eigen-multiple-input multiple-output (MIMO) with water-filling gives the maximum information-theoretic capacity, but realising this maximisation is not straightforward because practical factors are omitted. Adaptive modulation and error coding are combined for finding the maximum practicable capacity (throughput of correctly detected bits) in eigen-MIMO. Quadrature amplitude modulation (QAM) is th... View full abstract»

• ### Performance analysis of two-dimensional optical code-division multiple-access systems using novel multi-code pulse-position modulation

Publication Year: 2012, Page(s):2425 - 2431
Cited by:  Papers (1)
| | PDF (539 KB)

Previous works show that pulse-position modulation (PPM) is an effective signalling method for mitigating multiple-access interference, and hence is able to increase the number of users in two-dimensional (2-D) optical code-division multiple-access (OCDMA) systems. However, in order to achieve high bit-rates, 2-D OCDMA systems using PPM signalling require very high transmitted power because of the... View full abstract»

• ### Design of low peak-to-average power ratio transceiver with enhanced link quality for coded single-carrier frequency division multiple access system

Publication Year: 2012, Page(s):2432 - 2441
Cited by:  Papers (5)
| | PDF (1358 KB)

A new low peak-to-average power ratio (PAPR) transceiver is proposed for the coded single-carrier frequency division multiple access (SC-FDMA) system over frequency selective fading channels. By exploiting the constant envelope of the Chu-sequence in both frequency and time domains, the parallel spreading scheme and M-ary cyclic shift mapping technique can support the coded SC-FDMA system w... View full abstract»

• ### Transmission scheme for a K-way relay multiple-input multiple-output channel

Publication Year: 2012, Page(s):2442 - 2447
| | PDF (324 KB)

In the multiple-input multiple-output Gaussian K-users relay interference channel, each user intends to convey a multicast message to all the other users while receiving K-1 independent messages from the other users via an intermediate relay. An encoding and decoding strategy is proposed which is inspired from cryptography theory. The proposed encoding and decoding strategy involves a signal space... View full abstract»

• ### Singular value decomposition-based multiuser multiple-input multiple-output vector perturbationaided downlink transmitter and lattice-reductionassisted uplink receiver pair

Publication Year: 2012, Page(s):2448 - 2454
| | PDF (508 KB)

A full-duplex uplink/downlink (UL/DL) system having a UL transmitter/receiver (transceiver) pair and a DL transceiver is considered. Both the UL and DL are improved. The DL is enhanced by a novel vector perturbation (VP)-aided singular value decomposition (SVD)-based precoding scheme, which is capable of exploiting the different-quality SVD eigenbeams and substantially reduces the overall average ... View full abstract»

• ### Analytical modelling of a cognitive IEEE 802.11 wireless local area network overlaid on a cellular network

Publication Year: 2012, Page(s):2455 - 2464
Cited by:  Papers (1)
| | PDF (462 KB)

In this study, the authors propose an analytical model to evaluate the maximum stable throughput and average delay of a cognitive IEEE 802.11-based wireless local area network (WLAN) overlaid on uplink band of a cellular network. The main feature of the proposed model is to include different status of the cognitive users, that is, different spectrum opportunities for different secondary users, as ... View full abstract»

• ### Performance of general network coding nodes with stop-and-wait automatic repeat request transmission

Publication Year: 2012, Page(s):2465 - 2473
Cited by:  Papers (1)
| | PDF (708 KB)

The steady-state performance of general network coding node is investigated, when data are transmitted in packets based on the stop-and-wait automatic repeat request error-control scheme. The general network coding node considered has H number of incoming links that provide packets for forming the coded packets transmitted by one outgoing link. Each of the incoming and outgoing links is ass... View full abstract»

## Aims & Scope

IET Communications covers the theory and practice of systems, networks and applications involving line, mobile radio, satellite and optical technologies for telecommunications, and Internet and multimedia communications.

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