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# IEEE Transactions on Vehicular Technology

## Filter Results

Displaying Results 1 - 14 of 14
• ### Adaptive control for random access traffic in mobile radio systems

Publication Year: 1993, Page(s):87 - 93
Cited by:  Papers (5)  |  Patents (1)
| | PDF (608 KB)

An adaptive random access control method is developed for the idle-signal-casting multiple-access (ICMA) or other random-access protocols. Its purpose is to prevent channel breakdown by controlling permission probabilities of user terminal's transmission according to the load of a random-access channel. In ICMA, a base station broadcasts an idle' or busy' signal to prevent collisions of random a... View full abstract»

• ### Mobile propagation loss and delay spread characteristics with a low base station antenna on an urban road

Publication Year: 1993, Page(s):103 - 109
Cited by:  Papers (33)  |  Patents (1)
| | PDF (552 KB)

Propagation loss and delay spread were studied experimentally, in order to design digital mobile communication systems. For propagation loss, the results were as follows, (i) When there are no obstacles on the road, the distance over which a radio wave propagates with only free-space loss increases with frequency. (ii) When there are obstacles (trucks and buses). and when the base station antenna ... View full abstract»

• ### Channel assignment for cellular radio using simulated annealing

Publication Year: 1993, Page(s):14 - 21
Cited by:  Papers (169)  |  Patents (19)
| | PDF (800 KB)

The channel assignment problem, i.e. the task of assigning the channels to the radio base stations in a spectrum-efficient way, is an NP-complete optimization problem occurring during design of cellular radio systems. Previously, this problem has been solved by graph coloring algorithms. An alternative approach is presented. The problem is solved using simulated annealing, which is a general appro... View full abstract»

• ### On the performance of packet reservation multiple access with fixed and dynamic channel allocation

Publication Year: 1993, Page(s):78 - 86
Cited by:  Papers (29)  |  Patents (2)
| | PDF (936 KB)

The evaluation of packet reservation multiple access (PRMA) is extended from a single cell case, investigated in several previous papers, to a cellular environment characterized by user mobility and by the interference from other cells. The analysis is based on a comparison of PRMA performances with those of classical circuit switching schemes. The comparison methodology is defined, and the compar... View full abstract»

• ### Statistical analysis of the power sum of multiple correlated log-normal components

Publication Year: 1993, Page(s):58 - 61
Cited by:  Papers (76)
| | PDF (284 KB)

A statistical method is presented for the analysis of the power sum of multiple correlated log-normal random components. The results are compared with those of S.C. Schwartz and Y.S. Yeh (1982) and the Monte Carlo simulation. The effect of correlation on the mean and the variance of the combined multiple correlated log-normal components is also investigated. The presented method allows quick and a... View full abstract»

Publication Year: 1993, Page(s):94 - 102
Cited by:  Papers (7)  |  Patents (3)
| | PDF (872 KB)

An adaptive equalization technique using forward error control coding is described and evaluated. Computer simulation is used to compare the FEC-assisted adaptive equalization to conventional adaptive equalization. The system model employed is based on the proposed digital cellular communication standard for North America. The FEC-assisted adaptive equalization technique performs better than the c... View full abstract»

• ### Throughput analysis method for hybrid ARQ schemes over burst error channels

Publication Year: 1993, Page(s):110 - 118
Cited by:  Papers (21)
| | PDF (668 KB)

A definition of a burst error channel using a Markov model was presented by T. Sato et al. in a previous paper (1991). A throughput analysis method of hybrid automatic repeat request (ARQ) under the burst error channel using the three-state Markov model is described. The hybrid ARQ is studied for the random and burst error correction codes as the forward error correction (FEC) code, and multiframe... View full abstract»

• ### Delay and coding gain analysis of a truncated type-II hybrid ARQ protocol

Publication Year: 1993, Page(s):22 - 32
Cited by:  Papers (20)
| | PDF (896 KB)

Time delay of a truncated type-II hybrid ARQ protocol with one retransmission is analyzed by using queueing theory. The truncated protocol uses rate 1/2 error correcting codes. Parity bits for error correction are transmitted only when they are needed. It is shown that the truncated type-II hybrid protocol has a bounded delay and bounded queue length under typical communication traffic conditions.... View full abstract»

• ### Signature sequence selection in a CDMA system with orthogonal coding

Publication Year: 1993, Page(s):62 - 68
Cited by:  Papers (28)  |  Patents (15)
| | PDF (588 KB)

In code-division multiple-access (CDMA) systems, recent attention has focused on the use of orthogonal coding to provide spreading. Each signal is coded with the same orthogonal or biorthogonal code, followed by a modulo-2 addition of a unique signature sequence. The set of signature sequences used determines how much signals interfere with each other at a receiver, thus determining the performanc... View full abstract»

• ### Voice and data integration in the air-interface of a microcellular mobile communication system

Publication Year: 1993, Page(s):1 - 13
Cited by:  Papers (62)  |  Patents (12)
| | PDF (1244 KB)

A multiple-access protocol and a call acceptance algorithm for voice and data integration in a microcellular mobile communication system are presented. The protocol supports circuit-mode voice, burst-mode voice, and data. A hybrid multiplexing scheme with no boundaries performs statistical multiplexing, the call-level (for circuit-mode voice) and the talkspurt/message-level (for burst-mode voice a... View full abstract»

• ### Performance of microcellular mobile radio in a cochannel interference, natural, and man-made noise environment

Publication Year: 1993, Page(s):33 - 40
Cited by:  Papers (33)
| | PDF (680 KB)

A model is developed for performance analysis of a microcellular digital mobile radio system with Rayleigh-faded cochannel interference, Gaussian noise, and narrowband impulsive noise (Middleton's Class A noise) using the differential phase shift keying (DPSK) modulation technique. The desired signal is assumed to be Rician faded. The effects of selection diversity on the performance are investiga... View full abstract»

• ### Pseudo-analog speech transmission in mobile radio communication systems

Publication Year: 1993, Page(s):69 - 77
Cited by:  Papers (10)  |  Patents (3)
| | PDF (868 KB)

A low-complexity pseudo-analog speech transmission scheme is proposed for portable communications. It uses a speech coder based on adaptive differential pulse code modulation (ADPCM) in combination with a multilevel digital modulation technique such as M-ary DPSK or M-ary FSK and features low quantization noise, bandwidth efficiency, and robustness to transmission errors. A nonsy... View full abstract»

• ### Unified approach to prediction of propagation over buildings for all ranges of base station antenna height

Publication Year: 1993, Page(s):41 - 45
Cited by:  Papers (90)
| | PDF (536 KB)

Theoretical results for the dependence on base station antenna height of the average received signal for mobiles at street level are presented. The results apply to residential and commercial sections of cities and to all ranges of antenna height from well above to below that of the surrounding buildings. Assuming all buildings to be of equal heights, the range dependence of the average signal is ... View full abstract»

• ### Differential detection of π/4-shifted-DQPSK for digital cellular radio

Publication Year: 1993, Page(s):46 - 57
Cited by:  Papers (64)  |  Patents (8)
| | PDF (904 KB)

The detection of π/4-shifted-DQPSK modulation using a tangent-type differential detector with an integrated symbol timing and carrier frequency offset correction algorithm is discussed. π/4-shifted-DQPSK modulation has been proposed for use in a high-capacity, TDMA-based digital cellular system being developed in the US; differential detection could potentially allow the production of low-co... View full abstract»

## Aims & Scope

IEEE Transactions on Vehicular Technology covers land, airborne, and maritime mobile services, vehicular electrotechnology, equipment, and systems identified with the automotive industry.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Nei Kato, Professor
Graduate School of Information Sciences (GSIS)
Tohoku University
Aramaki-Aoba 6-3-09, Aoba-ku, Sendai, 980-8579, JAPAN
Email: kato@it.is.tohoku.ac.jp