Title :
A high resolution overlapping delay estimation for DS-CDMA
Author :
Li HanQiang ; Wei Guo ; Zheng Hui
Author_Institution :
Nat. Commun. Technol. Key Lab., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
We consider the problem of estimating overlapped multipath delay for DS-CDMA systems. A fast high resolution overlapping delay estimation technique is proposed. To eliminate the effect on estimation error caused by the complex amplitude phase of multipath, a new correlation-based estimation function is adopted. Also, to reduce complexity without losing resolution, the method utilizes an SVD-based sinusoid retrieval algorithm. Computer simulations show that the proposed method can resolve overlapped multipaths at low signal-to-noise ratio.
Keywords :
code division multiple access; computational complexity; correlation methods; delay estimation; multipath channels; signal detection; singular value decomposition; spread spectrum communication; DS-CDMA; SNR; SVD-based sinusoid retrieval algorithm; complex amplitude phase; complexity; correlation-based estimation function; estimation error; high resolution overlapping delay estimation; multipath delay estimation; signal-to-noise ratio; Amplitude estimation; Computer simulation; Delay effects; Delay estimation; Estimation error; Frequency domain analysis; Frequency estimation; Multiaccess communication; Phase estimation; Signal resolution;
Conference_Titel :
Communications, Circuits and Systems, 2004. ICCCAS 2004. 2004 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
0-7803-8647-7
DOI :
10.1109/ICCCAS.2004.1346057
