Performance analysis for downlink MC-CDMA systems with space-time block codes in frequency-selective Rayleigh fading channels

Hou, Zhihua; Dubey, V.K.

doi:10.1109/icics.2003.1292536

Cited by 1 publication

(1 citation statement)

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“…MC-CDMA combines the robustness to multipath fading by orthogonal frequency division multiplexing (OFDM), with the enhanced frequency diversity that can be achieved by code division multiple access (CDMA). To further exploit both spatial diversity and channel coding in multi-input multi-output systems and with low complexity receiver implementation, space-time block coding (STBC) has been combined with MC-CDMA systems in the past years [4][5][6][7]. Furthermore, to improve the quality-of-service, resource allocation has been investigated for MC-CDMA systems.…”

Section: Introductionmentioning

confidence: 99%

Energy-efficient user grouping algorithms for power minimisation in multi-carrier code division multiple access systems

Phasouliotis

Prawatmuang

2011

IET Commun.

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Energy efficiency has become increasingly important in wireless communications nowadays. Saving energy will not only reduce operating cost but also reduces greenhouse gas emissions, which is important for combating climate change. The authors propose energy-efficient user grouping algorithms to provide power minimisation of grouped multi-carrier code division multiple access (MC-CDMA) and space-time block coding MC-CDMA systems in a cellular environment. Depending on the channel fading conditions, power control is utilised to minimise the total transmitted power under a bit error rate constraint. When the allocation is performed without a fair data rate requirement, the authors provide the optimal solution to the minimisation problem. However, when some fairness is considered, the optimal solution requires high computational complexity. Thus, the authors solve the problem by proposing two suboptimal algorithms. Simulation results illustrate a significantly reduced power consumption in comparison with other techniques.

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Section: Introductionmentioning

confidence: 99%