Title :
Equalization for infrared wireless systems using OOK-CDMA
Author :
Yamaguchi, Hiroe ; Matsuo, Ryoko ; Ohtsuki, Tomoaki ; Sasase, Iwao
Author_Institution :
Dept. of Inf. & Comput. Sci., Keio Univ., Yokohama, Japan
Abstract :
We evaluate the performance of indoor infrared wireless systems using on-off keying code-division multiple-access (OOK-CDMA) systems with three kinds of equalizers: decision-feedback equalizer (DFE), decision-feedforward-and-feedback equalizer (DFFE), and feedforward equalizer (FE). To estimate the impulse response, we use the training sequence that alternates `1´ and `0´ sequentially. Among three kinds of equalizers, we show that the system with the DFFE can achieve the best performance at high bit rate. When the bit rate is low or the transmitted optical power is low, the system with the FE achieves the best performance
Keywords :
amplitude shift keying; code division multiple access; decision feedback equalisers; optical communication; optical modulation; transient response; DFE; DFFE; FE; OOK-CDMA; bit rate; decision-feedback equalizer; decision-feedforward-and-feedback equalizer; feedforward equalizer; impulse response; indoor infrared wireless systems performance; on-off keying code-division multiple-access; training sequence; transmitted optical power; Bit error rate; Bit rate; Decision feedback equalizers; Iron; Multiaccess communication; Optical fiber communication; Optical receivers; Optical transmitters; Performance analysis; Power system modeling;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.936297
