DocumentCode :
973314
Title :
Performance Analysis of a Coherent FH-MA System Based on Latin Squares
Author :
Stamatiou, Kostas ; Proakis, John G.
Author_Institution :
Univ. of California, San Diego
Volume :
6
Issue :
11
fYear :
2007
fDate :
11/1/2007 12:00:00 AM
Firstpage :
4183
Lastpage :
4192
Abstract :
Frequency hopping (FH) combined with coding is a popular technique in wireless communication applications. Motivated by the commercial system outlined in [1], this paper investigates the performance of a coherent FH multiple access (FH-MA) cellular system, where hopping patterns are constructed from latin squares. Some of the patterns carry pilot symbols, which the users track to estimate the channel on the data patterns and perform coherent detection. The latin squares construction enables us to analytically evaluate the bit error probability (BEP) over each data pattern, when convolutional codes are employed for error protection. The focus of our work is to precisely determine the effect that frequency and interference diversity, ensuing from FH, have on the coded performance. Regarding frequency diversity, it is shown that the performance can vary widely for different latin squares. Moreover, under pilot-assisted channel estimation, a performance tradeoff is observed, as an increasing frequency selectivity results in more diversity, but also more inaccurate channel state information. With respect to interference diversity, we analyze the performance when the interference power variations are perfectly known or ignored by the receiver. Our results confirm that interference tracking is important in harnessing the error correcting power of convolutional coding.
Keywords :
cellular radio; channel estimation; convolutional codes; diversity reception; error correction codes; frequency hop communication; multi-access systems; probability; BEP; bit error probability; channel state information; coherent FH-MA cellular system; convolutional codes; error correction; error protection; frequency hopping multiple access; frequency-interference diversity; hopping pattern; latin squares construction; pilot-assisted channel estimation; wireless communication application; Channel estimation; Convolutional codes; Error probability; Frequency diversity; Interference; Pattern analysis; Performance analysis; Protection; Spread spectrum communication; Wireless communication;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2007.060318
Filename :
4381427
Link To Document :
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