1. A method for blindly determining a channel impulse response for a channel in an orthogonal frequency division multiplexing (OFDM) communications system, comprising the steps of: providing at least first and second receive antennas which produce at least first and second OFDM received signals from a single OFDM signal transmitted over said channel; processing said first received signal and said second received signal to determine said channel impulse response for said channel, thereby permitting recovery of said signal transmitted OFDM signal; wherein said step of processing includes constructing a constructed matrix from said at least first and second received signals; performing a singular value decomposition on said constructed matrix to produce a left singular matrix and a right singular matrix; finding a right singular vector corresponding to a smallest singular value of said constructed matrix, thereby yielding said channel impulse response multiplied by an unknown scalar constant; and removing said unknown scalar constant, thereby yielding said channel impulse response.