Feasibility study for direct sequence spread spectrum and TV services overlay

In this paper we examine the conditions under which direct sequence spread spectrum systems can share the same spectrum with television services. The maximum spread spectrum transmit power is first estimated and the correspondent protection rates for the TV services are derived, along with the relevant image degradation. For the proposed protection ratios the performance of the direct sequence spread spectrum system is examined in order to derive the relevant BER and maximum achievable data rates.