Unambiguous Base Station Identifier Code in Widely Picocells area using Golay Complementary Sequence

Abstract

The wireless communication system has at least one picocellwithin macrocell. The use of picocell gives many advantages, savinga radiation power, increase the capacity and improve the dead zone.However, in a system where a large wide-area cell overlapped withmany of picocells, many of the picocells will have to re-use the sameBase Station Identifier Code (BSIC- small number of bits). Hence,when an MS roams from the wide-area cell into a target picocell, thereported BSIC may be ambiguous. The optimal operating point of thecombination above was obtained by analysis of cell distribution. Thispaper presents a new algorithm to classify the user according tomobility narrow and widely, then use Golay code complementarysequences for widely mobility user and implement a tracker circuitto track the user for accurate handover decision. The accuracy issatisfied by using Golay code and by tracking the user. Furthermore,the implementation of Golay code creator, correlator and trackercircuit by using Xilinx-spartan-3A XC3S700AFPGA, with 50 MHzinternal clock is supported for increasing the speed of operation andaccuracy.