Patent ID: 8259827

Claim:
A method of detecting a quick paging code word in a receiver in a communication system using a plurality of subcarriers for orthogonal frequency division multiple access, comprising: demodulating a portion of a received signal that corresponds to a predetermined preamble carried by a first set of the subcarriers; generating channel estimates based on the received preamble; interpolating the channel estimates over a second set of the subcarriers that carries the quick paging code word and is different from the first set of the subcarriers; and determining, based on the received signal and the channel estimates, whether the received signal includes a quick paging code word, wherein determining includes correlating the received signal using the channel estimates against a local version of the quick paging code word and wherein the correlating includes computing a correlation metric R according to: R = Re ⁢ { ∑ k ⁢ ⁢ r ⁡ ( k ) ⁢ c * ⁡ ( k ) ⁢ b ⁡ ( k ) ⁢ m ⁡ ( k ) } in which Re indicates a real part, k is an index of time offset, r(k) represents the received signal, c*(k) represents a complex conjugate of a channel estimate, b(k) represents the quick paging code word, and m(k) represents a known pseudorandom-noise sequence.