Title: 1. Consider a long random sequence of 0's and 1's that are independent and equally likely.
Author: Dr. Maan Kousa
Last saved by: Ali Hussein Muqaibel
Company: EE.Dept.

KFUPM-EE DEPT.
EE573- Digital Communications II
Dr. Ali Muqaibel

Assignment # 5: Spread Spectrum    Ver. 4.0

From Digital communications (Fifth Edition) by John Proakis and Masoud Salehi,

1) Problem 12.2 
2) Problem 12.9
3) A total of 30 equal-power users are to share a common communication channel by CDMA. Each user transmit information at a rate of 10kbits/s via DS spread spectrum and binary PSK. Determine the minimum chip rate to obtain a bit error probability of 10^-5. Additive noise at the receiver may be ignored in this computation.  Hint: you may need equations (12-2-38) & (12-2-46)
4) Problem 12.14
5) Problem 12.18
6) Assume that one of your colleagues designed the following set of PN sequences to be used for 4 users CDMA application with  m= 3
    0010111  
    1110101
    1100010
    1010101
   and he claims  that Gold or Kasami cannot do as good as he did. Can you evaluate his claim?  You may use MATLAB to analyze the sequences if need be. 

Instruction:

o	For this homework, individual submission is required.  Verbal cooperation is encouraged. Written cooperation is not allowed.
o	Most of these problems are short but could consume some time, please start early to be able to meet the submission time.
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