Title :
Optimized resource allocation strategy for a single-cell downlink AMC-OFDMA systems
Author :
Al-Janabi, Muayad S. ; Tsimenidis, Charalampos C. ; Sharif, Bayan S. ; Le Goff, Stephane Y.
Author_Institution :
Comput. Eng. Dept., Univ. of Technol., Baghdad, Iraq
Abstract :
Resource allocation for a downlink orthogonal frequency division multiple access (OFDMA) system ensures that capacity and throughput are maximized. In the literature, either channel coding is not considered or only a fixed code rate is specified. To overcome this problem, an optimized cross-layer resource allocation strategy that distributes the user, bit and power optimally has been proposed for adaptive modulation and coding (AMC) based single-cell downlink OFDMA systems. The proposed strategy, which is referred to as optimized user, bit and power allocation (OUBPA), considers throughput as a new cost function in terms of spectral efficiency and bit-error rate (BER) to allocate the available resources. An optimized approach is presented for solving the throughput maximization problem and simulation results demonstrating that the throughput performance of the OFDMA-AMC system using OUBPA strategy outperforms conventional techniques.
Keywords :
OFDM modulation; adaptive modulation; cellular radio; channel coding; error statistics; frequency division multiple access; radio links; resource allocation; BER; OUBPA strategy; adaptive modulation and coding; bit-error rate; channel coding; cost function; cross-layer resource allocation strategy; maximization problem; optimized user bit and power allocation; orthogonal frequency division multiple access system; resource allocation strategy optimization; single-cell downlink AMC-OFDMA system; spectral efficiency; Bit error rate; Downlink; Encoding; Resource management; Signal to noise ratio; Throughput; Wireless communication; AMC; OFDMA; User allocation; bit allocation; power allocation; throughput;
Conference_Titel :
Electronics, Circuits, and Systems (ICECS), 2013 IEEE 20th International Conference on
Conference_Location :
Abu Dhabi
DOI :
10.1109/ICECS.2013.6815391