Signal detection for spread spectrum communication systems with gradient algorithm

Retrieval process of original symbols of a spread spectrum based communication system is tried to be improved by Gradient Algorithm (GA) and Blind Source Separation (BSS) principles. Two simple schemes, based on two energy functions are presented. Time correlation properties of the channel are used as advantages in developing the filter coefficients for the receiver. Direct Sequence - Code Division Multiple Access (DS-CDMA) technique based system setup is used for algorithm testing purposes. This is identified as one of the most stable spread spectrum communication technique where most of the technologies developed for that are highly compatible with High Speed Packet Access (HSPA) transmission technique as well. A transmission operated in a synchronous, downlink wireless channel is used to evaluate performance of the algorithms. Better performance than basic transmission can be demonstrated with these combined schemes under these conditions. Even though it is not quantified, low processing complexity of these algorithms can be identified as an important property of them.