Title :
A generalized adaptive code acquisition scheme using backpropagation network in DS/SS systems
Author :
Yu, Takki ; Han, Sangchul ; Hong, Daesik ; Kang, Changeon
Author_Institution :
Dept. of Electr. & Electron. Engin, Yonsei Univ., Seoul, South Korea
Abstract :
A generalized adaptive code acquisition scheme is proposed by using a multi-layer structure. The backpropagation network (BPN) is used in modeling the multilayer system. The timing offset of the received code can be detected by combining the hidden layer weights after an adaptation period. The characteristics of mean squared error (MSE) and weight distribution for the generalized system are analyzed, and the effects of input and hidden nodes are investigated. The generalized system provides a high detection probability and flexibility in acquisition system design.
Keywords :
adaptive filters; adaptive signal detection; backpropagation; error statistics; filtering theory; mean square error methods; spread spectrum communication; synchronisation; DS/SS systems; FIR adaptive filter; MSE; acquisition system design; adaptation period; adaptive filter; backpropagation network; code synchronization; detection probability; direct sequence spread spectrum; generalized adaptive code acquisition; hidden layer weights; hidden nodes; input nodes; mean squared error; multilayer structure; multilayer system; received code; timing offset; weight distribution; Adaptive coding; Adaptive filters; Adaptive systems; Backpropagation; Delay estimation; Finite impulse response filter; Intelligent networks; Spread spectrum communication; Time measurement; Timing;
Conference_Titel :
Communication Systems, 2002. ICCS 2002. The 8th International Conference on
Print_ISBN :
0-7803-7510-6
DOI :
10.1109/ICCS.2002.1182512
