Throughput Analysis of DS-CDMA Wireless Packet Access using Frequency-Domain Equalization and Random TPC

Ito, Hironobu; Kudoh, Eisuke; Wang, Zhisen; Adachi, Fumiyuki

doi:10.1109/vetecf.2008.399

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…In [30], the authors applied random transmit power control to DS-CDMA packet mobile radios to obtain the capture effect and increase the link capacity. They enhanced their random TPC approach by combining it with inter-path interference cancellation [31] and with frequency-domain equalization [32]. Behzad et al [33] introduced the Fair Randomized Power Control (FRPC) algorithm to increase throughput while providing fairness for different mobile users in the system.…”

Section: Random Transmit Powersmentioning

confidence: 99%

Random Transmit Power Control for DSRC and its Application to Cooperative Safety

Kloiber

Härri

Strang

et al. 2016

IEEE Trans. Dependable and Secure Comput.

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Cooperative safety applications require Dedicated Short-Range Communications (DSRC) to provide position-awareness of neighboring vehicles at a specific level of reliability, i.e. awareness-quality, up to a given distance, i.e. awareness-range. However, heavy communication loads negatively impact such awareness requirements due to communication impairments, ranging from strict capacity limitations of DSRC channels to correlated packet collisions due to periodic communication patterns. Transmission control strategies may adapt power or rate to control such impairments but risk missing the requirements of cooperative safety applications. In this paper, we design a new awareness control strategy by implementing a spatial awareness framework. Specifically, we adapt the distribution of the awareness-quality as a function of the awareness-range. Therefore, we first propose Random Transmit Power Control (RTPC), which manages to provide different levels of awareness-quality at different ranges, while mitigating correlated packet collisions by randomizing them in space. As RTPC is able to reduce the channel load, we secondly propose to combine RTPC with Transmit Rate Control (TRC) and to benefit from the gained channel resources by subsequently increasing the update-rate and by implication, the quality of position-awareness. The spatial awareness control capability of RTPC+TRC has been evaluated through simulations. We discuss the influence of RTPC+TRC on cooperative safety applications exemplarily for the Forward Collision Warning (FCW) application.

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Section: Random Transmit Powersmentioning

confidence: 99%

Random Transmit Power Control for DSRC and its Application to Cooperative Safety

Kloiber

Härri

Strang

et al. 2016

IEEE Trans. Dependable and Secure Comput.

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“…Power control, and specifically random power control, has traditionally been utilized in random access to provide the capture effect [10]. The impact of finite order modulation and realistic codes on system capacity is studied in [11], where systems with Quadrature Phase Shift Keying (QPSK) and binary codes are shown to approach the capacity of Gaussian signaling as the size of the user population grows.…”

Section: Introductionmentioning

confidence: 99%

Power Randomization for Iterative Detection Over Random-Access Fading Channels

Rossi

Kansanen

Müller

et al. 2015

IEEE Trans. Wireless Commun.

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In this paper we focus on throughput performance of multiuser communications systems over fading channels. More specifically, we consider the uplink where multiuser detection under asynchronous transmissions is exploited for random access management and iterative receivers are considered for practical issues. Normalized throughput is evaluated through a semianalytic procedure in order to avoid time-consuming simulations. Power randomization is explored as a means for improving performance through system asymmetries. It is found beneficial especially in case of overloaded systems operating at low-tomedium signal-to-noise ratio (SNR), where it allows reducing significantly the number of iterations at the receiver.

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Throughput Analysis of DS-CDMA Wireless Packet Access using Frequency-Domain Equalization and Random TPC

Cited by 2 publications

References 8 publications

Random Transmit Power Control for DSRC and its Application to Cooperative Safety

Random Transmit Power Control for DSRC and its Application to Cooperative Safety

Power Randomization for Iterative Detection Over Random-Access Fading Channels

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