Title :
The Model of Evolutionary Interleavers for IDMA Communication System
Author :
Xinyi Xu ; Qiuping Zhu ; Liang Zhu ; Weibing Wang ; Kegang Liu
Author_Institution :
Sch. of Electron. Inf., Wuhan Univ., Wuhan
Abstract :
This paper presents the model of interleavers for the interleave-division multiple-access (IDMA) based on evolutionary algorithm. In all the previous works, interleavers are all generated independently and randomly which is simple but with good performance. Considered the difference between the model of interleavers and the traveling salesman problem(TSP), a specific fitness function based on covariance matrix is given and the optimum interleavers are computed by evolutionary algorithm. The simulation results show that the bit error ratio(BER) performance of the evolutionary interleavers(EI) is much better than other unrandom interleavers. The BER performance of independent and random interleavers is near to EI, it is a proof that EI is the theoretical optimum interleavers for IDMA.
Keywords :
covariance matrices; error statistics; evolutionary computation; interleaved codes; multi-access systems; travelling salesman problems; BER; IDMA communication system; bit error ratio; covariance matrix; evolutionary algorithm; evolutionary interleavers; interleave-division multiple-access; traveling salesman problem; Cities and towns; Communication systems; Covariance matrix; Electronic mail; Evolutionary computation; Interleaved codes; Multiaccess communication; Multiple access interference; Transmitters; Traveling salesman problems;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1311-9
DOI :
10.1109/WICOM.2007.194