Patent ID: 7702042

Claim:
An arrangement for iterative channel impulse response estimation in a system employing a transmission channel, comprising: a channel impulse response estimator for producing iteratively from a received signal (y) a channel impulse response estimate ({circumflex over (p)}); and a noise estimator for producing from the received signal (y) iteratively at each iteration K an estimated vector of noise samples {circumflex over (b)}(K) = y −H· {circumflex over (p)}(K−1) , where H is a matrix depending on known symbols, computing from the estimated vector of noise samples a vector of noise covariance taps r ⁡ ( K ) _ = win k · ∑ l = k L y - 1 ⁢ b l ⁡ ( K ) · b l - k ⁡ ( K ) * where win k is a windowing function with a positive Fourier transform, and using the vector r(K) to produce a new matrix W(K) representing the inverse of noise covariance, and said channel impulse response estimator is arranged, at each iteration (K), to respond to said new matrix W(K) representing the inverse of noise covariance to produce a single improved channel impulse response estimate {circumflex over (p)}(K) =(H H ·W(K)·H) −1 ·H H ·W(K)· y .