Title :
Bias in CDMA channel estimates with the use of short spreading sequences
Author_Institution :
Centre for Wireless Commun., Nat. Univ. of Singapore, Singapore
Abstract :
We demonstrate that channel estimates obtained using the conventional correlation-based approach are biased when short spreading sequences are employed in CDMA systems. A simple decorrelating estimator is proposed to remove the bias and hence improve estimation performance
Keywords :
code division multiple access; codes; decorrelation; multiuser channels; parameter estimation; sequences; signal detection; spread spectrum communication; CDMA channel estimates; I/Q code multiplexed pilot symbols; bias removal; biased correlation-based approach; decorrelating estimator; estimation performance improvement; multiuser detection; short spreading sequences; Bit error rate; Channel estimation; Decorrelation; Delay effects; Delay estimation; Detectors; Frequency estimation; Multiaccess communication; Signal processing; Wireless communication;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on
Conference_Location :
Parsippany, NJ
Print_ISBN :
0-7803-6560-7
DOI :
10.1109/ISSSTA.2000.878130
