A study on multi-user access in energy detection UWB-IR receiver

This paper discusses a multi-user access technique for Ultra-wideband Impulse Radio (UWB-IR) system in energy detection receiver. The UWB-IR system is modulated by On-Off shift Keying (OOK). As multi-users access scheme, the Code Division Multiple Access (CDMA) using the Optical Orthogonal Code (OOC) sequence is adopted. The integral interval and the sample energy threshold value are optimized to improve the Bit Error Rate (BER) performance. The BER performances of proposed scheme are evaluated and compared with conventional energy detection receiver in the low data rate PAN (Personal Area Network) channel. The effect of inter-user interference is improved by using proposed optimization technique.