Title :
A study on non-coherent reception of M-ary spread-spectrum signals in the presence of carrier frequency offset
Author :
Wada, Tadahiro ; Yamazato, Takaya ; Katayama, Masaaki ; Ogawa, Akira
Author_Institution :
Dept. of Inf. Electron., Nagoya Univ., Japan
Abstract :
In this paper, we deal with the reception of M-ary spread-spectrum (M-ary/SS) signals in the presence of the carrier frequency-offset. The influence of frequency-offset on reception of M-ary/SS signals is investigated and it is shown that frequency-offset may degrade the symbol-error-rate performance remarkably, yet, the influence has a distinctive property. Making use of this property, we propose a new scheme that can mitigate the influence of the frequency-offset. The scheme is based on the assignment of the two distinctive Hadamard codes to in-phase and quadrature components of the transmitted signal. The selection of the set of Hadamard codes and the power ratio of the in-phase and quadrature component of the transmitted signal is evaluated in terms of symbol-error-rate and carrier frequency offset. As a result we found that the scheme shows the satisfactory symbol-error-rate in the presence of carrier frequency offset up to a half of symbol rate
Keywords :
Gaussian channels; Hadamard matrices; Hadamard transforms; binary sequences; pseudonoise codes; radio receivers; sequential codes; spread spectrum communication; transform coding; AWGN channel; Hadamard code; M-ary spread-spectrum signals; carrier frequency offset; in-phase component; noncoherent reception; power ratio; quadrature component; symbol-error-rate performance; Degradation; Error correction; Error correction codes; Frequency; Interference; Performance analysis; Power system modeling; Robustness; Spread spectrum communication; System performance;
Conference_Titel :
Universal Personal Communications. 1995. Record., 1995 Fourth IEEE International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-7803-2955-4
DOI :
10.1109/ICUPC.1995.496932
