Title :
Maximum ratio combining for OFDM systems with cochannel interference
Author :
Seo, Bo-Seok ; Choi, Seong-Gon ; Cha, Jae-Sang
Author_Institution :
Sch. of Electr. & Comput. Eng., Chung-Buk Nat. Univ., Cheongju, South Korea
Abstract :
In this paper, we investigate a receive diversity combining method for orthogonal frequency division multiplexing wireless local area network systems with cochannel interference. The scheme utilizes interference plus noise power (INP) to obtain the weighting factors for signal to interference plus noise power ratio (SINR) based maximum ratio combining (MRC). INP is estimated by using the correlation between the subchannel gains within the coherence bandwidth of the channel, which is caused by the limited delay spread of the multipath channel. Simulation results show that the SINR based MRC using the proposed INP estimator reveals greatly improved packet error rate performance compared to the signal-to-noise ratio based MRC that only considers white channel noise.
Keywords :
OFDM modulation; cochannel interference; diversity reception; error statistics; multipath channels; wireless LAN; OFDM systems; cochannel interference; diversity combining method; maximum ratio combining; multipath channel; orthogonal frequency division multiplexing; signal-to-noise ratio; wireless local area network systems; Bandwidth; Coherence; Delay estimation; Diversity methods; Diversity reception; Indium phosphide; Interchannel interference; OFDM; Signal to noise ratio; Wireless LAN;
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2006.1605030
