Logistic map based spread spectrum modulation in faded wireless channel
Katyayani Kashyap, Manash Pratim Sarma, Kandarpa Kumar Sarma, Nikos E. Mastorakis · 2015
Spread spectrum modulation finds a very important place in wireless communication due to many striking features like robustness to noise and interference, application of Code Division Multiple Access (CDMA) and so on. But generation of an efficient spreading code is always challenging and crucial too. This paper presents a design of chaotic spreading sequence for application in a Direct Sequence Spread Spectrum (DS SS) based system with the considerations of a faded wireless channel. Enhancing the security of data transmission is a main issue and can better be addressed with a chaotic sequence. Generation and application of chaotic sequence is done and a comparison with Gold sequence is presented which clearly indicates achieving better performance with simplicity of design. Performance evaluation is done in terms of BER, computational time and mutual information for faded channel taking into considerations of different modulation schemes, which finally dictates the efficiency of the generated code in high data rate modulation schemes.