Resource Allocation in OFDMA Networks With Imperfect Channel State Information

Zhuwei Wang; Lihan Liu; Xiaodong Wang; Jing Zhang

doi:10.1109/lcomm.2014.2340872

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Resource Allocation in OFDMA Networks With Imperfect Channel State Information

Zhuwei Wang Lihan Liu Xiaodong Wang Jing Zhang

Year: 2014 Journal: IEEE Communications Letters Vol: 18 (9)Pages: 1611-1614 Publisher: IEEE Communications Society

DOI: 10.1109/lcomm.2014.2340872

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Abstract

This letter investigates the effect of imperfect channel state information (CSI) on the performance of radio resource management for a downlink multi-user OFDMA system. It is shown that the imperfect CSI introduces a signal-and-power dependent noise term, which makes the symbol error rate (SER) constellation-point dependent, and yields an error floor on the SER. In addition, a two-step multi-user channel, power and constellation allocation algorithm is proposed to maximize the total network throughput.

Keywords:

Computer science Channel state information Telecommunications link Resource allocation Channel (broadcasting) Frequency-division multiple access Throughput Orthogonal frequency-division multiplexing Bit error rate Computer network Imperfect Orthogonal frequency-division multiple access Channel allocation schemes Resource management (computing) Algorithm Telecommunications Wireless

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Advanced Wireless Network Optimization

Physical Sciences → Engineering → Electrical and Electronic Engineering

Advanced MIMO Systems Optimization

Physical Sciences → Engineering → Electrical and Electronic Engineering

Wireless Communication Networks Research

Physical Sciences → Computer Science → Computer Networks and Communications

Resource Allocation in OFDMA Networks With Imperfect Channel State Information

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