Design and Analysis of Non-vulnerable PRBS Generation with Internal Shift and XOR of LFSR

Linear feedback shift register (LFSR) generates the pseudorandom binary sequence (PRBS) used in the 3G wireless standards code division multiple access (CDMA). LFSR has inherent properties and widely applied in digital random number generator, encoding techniques, built-in self-test (BIST) and cryptography. PRBS sequence length becomes vital and depends on the hardware complexity, namely registers. In this, PRBS generation with internal shift performed with XOR on the conventional LFSR increases the PRBS sequence length with reduced hardware complexity. Results are compared with conventional techniques to reveal the properties of the proposed method on bar with the conventional techniques with double the sequence length while retaining same hardware complexity and reduced switching activity. With this, future wireless communication increases the number of codes, and hence, the number of users accommodation increases drastically with low intentional interference.