Assignment:
There are 11 equal-power terminals in a CDMA communication system. transmitting signals toward a central node. Each terminal transmits information at 1 khit/s on a 100-kchips/s direct-sequence spreading signal using BPSK modulation.
(a) If receiver noise is negligible with respect to the interference from other users. what is the ratio of bit energy to interference power spectral density (Eb/N0) received by a receiving terminal?
(b) What is the effect on Enllnif all users double their output power?
(c) If the users wish to expand their service to 101 equal-power users, what must be done to the spreading codes to maintain the original Eb/N1 ratio?
Provide complete and step by step solution for the question and show calculations and use formulas.