Performance Improvement of Cooperative Relaying Scheme Based on OFCDM in UWB Channel

Orthogonal frequency and code division (OFCDM) provides a good performance on broadband or wide-band channel, because it can mitigate multi-path interference with keeping high data rate. So, this scheme is suitable to employ the future wireless communication system. And, Cooperative relaying scheme has been proposed to get the spatial diversity gains in multiuser wireless systems. Because, this scheme need no multiple antenna, it makes devices with low cost and small size. In this paper, we proposed the cooperative relaying scheme based on OFCDM. This system has profit of OFCDM and cooperative relaying schemes. It is also not much more complex than the single antenna OFCDM system. This scheme is appropriate to the next generation mobile wireless system, because of having both advantages. The performance of the proposed scheme is evaluated in terms of bit error rate (BER) performance for the OFCDM in the UWB channel.