Design of a Specific Code Division Pilot-Assisted Channel Estimation Method for DS-CDMA Systems

(1) Design a specific code division pilot-assisted channel estimation method for DS-CDMA systems. Implement both Equal Gain Combining (EGC) and Maximum Ratio Combining (MRC) techniques at the receiver. Perform Simulink simulations to measure BPSK bit error rate performance. Plot the relationship curves between bit SNR vs. channel estimation mean square error and bit SNR vs. BER. Explain the distinct physical implications of both combining schemes when BER reaches 0.01, including implementation considerations for pilot signal generation, correlation-based channel estimation, and combining weight calculations.