Performance Analysis of Spread Spectrum Transmission in Ad-hoc Networks

Spread spectrum ad-hoc networks have multiple advantages in terms of concurrent transmissions, meeting end-to-end delay QoS requirements and enabling energy savings. In this paper the throughput performance of the common spreading control channel is analyzed by introducing the queuing system M/D/infin and Markov chain model, and the impact of using BCH(n, k) in the control channel is also discussed. Moreover, bandwidth efficiency is evaluated for the spread spectrum ad-hoc networks. It is shown that the throughput performance of the common spreading channel is outperformed over the one in narrow-band ad-hoc networks, and the benefits increase with the increase of processing gain. Moreover, the bandwidth efficiency can be well designed by choosing proper coding rate and processing gain.