Title :
On LDPC decoding for frequency hopping OFDMA cellular systems in the downlink
Author :
Kim, Yun Hee ; Kim, Kwang Soon ; Lee, Sang Hyeon
Author_Institution :
Sch. of Electron. & Inf., Kyung Hee Univ., Seoul, South Korea
fDate :
30 May-1 June 2005
Abstract :
In this paper, we consider an FH-OFDMA system with LDPC codes for the downlink of cellular systems to realize the frequency reuse factor of one. For the system, we propose simple erasure detection and LDPC decoding methods to effectively combat the highly non-uniform interference caused by the different power allocation to the data channels and frequency hopping in adjacent cells. With the proposed methods, the performance is remarkably improved in partially interfered cases without severe performance loss in uniformly interfered cases.
Keywords :
cellular radio; channel coding; decoding; frequency division multiple access; frequency hop communication; parity check codes; radio links; wireless channels; LDPC decoding; data channels; frequency hopping OFDMA cellular system downlink; frequency reuse factor; nonuniform interference; power allocation; Downlink; Envelope detectors; Interference; Iterative decoding; Mobile communication; Modulation coding; Parity check codes; Performance loss; Radio spectrum management; Spread spectrum communication;
Conference_Titel :
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
Print_ISBN :
0-7803-8887-9
DOI :
10.1109/VETECS.2005.1543579
