Low-complexity variable forgetting factor mechanism for RLS algorithms in interference mitigation applications

In this work, we propose a low-complexity variable forgetting factor (VFF) mechanism for recursive least square (RLS) algorithms in interference mitigation applications. The proposed VFF mechanism employs a time average of the error correlation to automatically adjust the forgetting factor in order...

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Vydáno v:2012 International Symposium on Wireless Communication Systems (ISWCS) s. 471 - 475
Hlavní autoři: Yunlong Cai, de Lamare, R. C.
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 01.08.2012
Témata:
adaptive receivers
Continuous wavelet transforms
Indexes
Interference mitigation
RLS algorithm
time-varying channels
variable forgetting factor
ISBN:9781467307611, 1467307610
ISSN:2154-0217
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Shrnutí:In this work, we propose a low-complexity variable forgetting factor (VFF) mechanism for recursive least square (RLS) algorithms in interference mitigation applications. The proposed VFF mechanism employs a time average of the error correlation to automatically adjust the forgetting factor in order to ensure fast convergence and good tracking of the interference and the channel variations. Simulation results for a direct-sequence code-division multiple access (DS-CDMA) system are presented for nonstationary environments and show that the proposed VFF mechanism achieves superior performance to previously reported methods at a reduced complexity.
ISBN:9781467307611
1467307610
ISSN:2154-0217
DOI:10.1109/ISWCS.2012.6328412