Patent ID: 6944205

Claim:
A method of determining an acquisition indicator bit AI s at a receiver in a communication system, the method comprising: receiving multiplexed acquisition bits y=B×AI+n, where B is the signature matrix known at both base station and the receiver, AI is all the acquisition indicator bits and n represents noise; calculating an estimated value of the AI bit of interest AÎ ML (s) as a function of ∑ j ⁢ B T ⁡ ( s , j ) × y ⁡ ( j ) , where B T (s,.) is the s-th row vector of the transposed matrix B T for acquisition indicator bit AI s ; and setting the acquisition indicator bit AI s as follows: AI s =−1, if AÎ ML ( s )< R AI s =0, if R≦AÎ ML ( s )< U AI s =1, if AÎ ML ( s )≧ U where R and U are decision thresholds.