# IET Communications

## Filter Results

Displaying Results 1 - 13 of 13
• ### Efficient classification algorithm and a new training mode for the adaptive radial basis function neural network equaliser

Publication Year: 2012, Page(s):125 - 137
Cited by:  Papers (1)
| | PDF (1209 KB)

The study presents a new classification algorithm and a new online training mode used for learning the parameters of a Bayesian RBFNN (radial basis function neural network) equaliser in a non-linear time-varying channel. The classification algorithm is used to determine the centres of the hidden layer neurons that are equal to the channel states. This proposed unsupervised classification algorithm... View full abstract»

• ### Entropy-based location management in long-term evolution cellular systems

Publication Year: 2012, Page(s):138 - 146
Cited by:  Papers (4)
| | PDF (547 KB)

The recently emerging location-based services in long-term evolution (LTE) systems require the accurate and efficient tracking of mobile users. An optimal information-theoretic framework is developed for tracking area update (TAU) for next-generation LTE cellular systems. Shannon's entropy is used to characterise the location uncertainty of the mobile users. Based on this entropy-based tracking fr... View full abstract»

• ### Performance analysis of angle diversity for direction finding in 2.4 ghz tracking applications

Publication Year: 2012, Page(s):147 - 156
Cited by:  Papers (1)
| | PDF (709 KB)

The authors present the angle diversity technique implemented on a real-time location system designed for tracking applications according to the angle-of-arrival estimation, operating in the 2.4 GHz band. Some problems inherent to the classical interferometers are theoretically analysed relative to the noise-level variation and influence of radiofrequency interferences, due to sharing an unlicense... View full abstract»

• ### Iterative turbo beamforming for orthogonal frequency division multiplexing-based hybrid terrestrial-satellite mobile system

Publication Year: 2012, Page(s):157 - 164
Cited by:  Papers (2)
| | PDF (743 KB)

In the context of orthogonal frequency division multiplexing (OFDM)-based systems, pilot-based beamforming (BF) exhibits a high degree of sensitivity to the pilot sub-carriers. Increasing the number of reference pilots significantly improves BF performance as well as system performance. However, this increase comes at the cost of data throughput, which inevitably shrinks due to transmission of add... View full abstract»

• ### Performance analysis of amplify-and-forward relaying over Weibull-fading channels with multiple antennas

Publication Year: 2012, Page(s):165 - 171
Cited by:  Papers (8)
| | PDF (362 KB)

Amplify-and-forward (AF) relaying with multi-branch dual-hop relays in independent non-identical Weibull fading channels with multiple antennas at the destination is addressed. The authors consider orthogonal relaying and study conventional cooperative systems where all relays participate in the relaying phase as well as opportunistic cooperative systems where only the best relay participates in t... View full abstract»

• ### Index assignment-based channel coding

Publication Year: 2012, Page(s):172 - 178
Cited by:  Papers (1)
| | PDF (287 KB)

A scheme named index assignment-based channel coding (IACC) has been developed for resilience of speech/audio codecs against the bit errors commonly experienced in wireless channels. Although IACC is a type of joint source channel coding, it does not intervene with the source codec design. The proposed scheme takes into account source characteristics and adjusts the amount of coding according to t... View full abstract»

• ### Interference impact on the outage capacity of a frequency diversity paradigm in cognitive radio networks

Publication Year: 2012, Page(s):179 - 186
Cited by:  Papers (1)
| | PDF (325 KB)

A cognitive radio (CR) network is formed by allowing the secondary users to opportunistically access the frequency bands that are idle in time or frequency whenever the primary users (PUs) are not using these bands. In fact, this new technology tries to solve the spectrum scarcity. In this study, with the assumption that the CR users operate in a wideband communication system, first the bandwidth ... View full abstract»

• ### Efficient network coding-based multicast retransmission mechanism for mobile communication networks

Publication Year: 2012, Page(s):187 - 193
Cited by:  Papers (7)
| | PDF (259 KB)

This study proposes a network Coding-based RETransmission (CoRET) mechanism for supporting multicast service in mobile communication networks. CoRET introduces deterministic network coding to improve retransmission efficiency and retransmission reliability. To support CoRET, a couple of efficient packet selection algorithms are proposed, one is called MostLeast` selection and the other is called... View full abstract»

• ### Two-way denoise-and-forward network coding opportunistic relaying with jointing adaptive modulation relay selection criterions

Publication Year: 2012, Page(s):194 - 202
Cited by:  Papers (4)
| | PDF (422 KB)

To improve the performance of the two-way denoise-and-forward network coding opportunistic relaying systems (TW-DNF-OR), two novel best-relay selection criterions are presented, which are the jointing adaptive modulation max-min criterion (AM-MM) and the jointing adaptive modulation maximum harmonic mean criterion (AM-MHM). In the proposed AM-MM and AM-MHM criterions, the effect of the modulation ... View full abstract»

• ### ATPOO: An adaptive transmitting platform for supporting on-time and at-one-time data delivering over opportunistic networks

Publication Year: 2012, Page(s):203 - 210
| | PDF (515 KB)

The link performance is highly unpredictable and the connections are broken frequently in opportunistic networks (Oppnets). The transmission control protocol will perform badly in Oppnets because the end-to-end connection always needs to be reconstructed and data need to be retransmitted from the original sender again through the reconstructed connection. To solve this problem, the study investiga... View full abstract»

• ### Vertical handoff decision algorithm for improved quality of service in heterogeneous wireless networks

Publication Year: 2012, Page(s):211 - 223
Cited by:  Papers (16)
| | PDF (919 KB)

Fourth-generation networks are expected to integrate heterogeneous wireless technologies. To ensure seamless mobility across disparate wireless technologies, efficient handoff schemes are required to enhance quality of service (QoS) and offer reliable ubiquitous computing environment. This study reviews classical and existing fuzzy approaches adopted for vertical handoff to ensure seamless mobilit... View full abstract»

• ### Blind channel estimation and discrete speed tracking in wireless systems using independent component analysis with particle filtering

Publication Year: 2012, Page(s):224 - 234
Cited by:  Papers (1)
| | PDF (638 KB)

For high data rate multiple-input multiple-output (MIMO) systems, a joint blind channel estimation and data recovery algorithm is presented for where the relative speed of the transmit/receive terminals may change. This changing speed is called manoeuvering. The blind technique is based on non-stationary independent component analysis with a generalised exponential density function to separate eac... View full abstract»

• ### Utility maximisation in channel-aware and queue-aware orthogonal frequency division multiple access scheduling based on arrival rate control

Publication Year: 2012, Page(s):235 - 241
Cited by:  Papers (2)
| | PDF (496 KB)

A channel-aware and queue-aware (CAQA) scheduling scheme is proposed for the downlink of orthogonal frequency division multiple access (OFDMA) networks. The scheduling scheme cooperates with a rate control policy, which controls arrival rates to the base station queues. The network resource allocation is formulated as a utility maximisation problem, which is decomposed into a CAQA OFDMA scheduling... 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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