標題: Performance Analysis of a Complex Multicode Tracking Loop in Bandlimited Rayleigh Fading Channels
作者: Hsu, Nicolas Y. -H.
Su, Yu T.
Lin, Yuan-Bin
電子工程學系及電子研究所
電信工程研究所
Department of Electronics Engineering and Institute of Electronics
Institute of Communications Engineering
關鍵字: Code tracking;Complex multicode spreading;Bandlimited fading
公開日期: 1-八月-2011
摘要: This paper presents the root-mean-squared tracking error performance analysis of a class of coherent digital delay-locked loops for multicode direct sequence spread spectrum signals in bandlimited correlated Rayleigh fading channels. In the transmit side, multiple independent PSK-modulated data streams in the in-phase and qudrature phase branches are spread by short mutually orthogonal codes before being further complex spread by a long complex PN code. We assume that the system employs a pilot code channel to assist the receiver's synchronization and channel estimation. The proposed code tracking loop incorporates the pilot-aided channel estimator and derives the timing error from all short-code-spread subchannels. Our analysis takes into account the effects of imperfect channel estimate, correlated frequency selective Rayleigh fading and band-limiting. Numerical results are presented to quantify the impact of the resulting multipath interference within the same code channel and amongst different code channels.
URI: http://dx.doi.org/10.1007/s11277-010-9924-8
http://hdl.handle.net/11536/20993
ISSN: 0929-6212
DOI: 10.1007/s11277-010-9924-8
期刊: WIRELESS PERSONAL COMMUNICATIONS
Volume: 59
Issue: 4
起始頁: 553
結束頁: 570
顯示於類別:期刊論文


文件中的檔案:

  1. 000293285300001.pdf