SIR Estimation for Narrow-band M-PSK Modulated Radio Links

c This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessible. 2 Abstract A large number of radio resource management algorithms rely on accurate measurements of the signal to interference ratio (SIR). We propose a simple, fast SIR estimator for narrow-band M-PSK modulated signals (M > 2). The estimator does not require any overhead sequences of known symbols and it is shown to be asymptotically unbiased. It can produce an accurate estimate for each received signal burst. Numerical results are presented for a Rayleigh fading channel with one and several interferers.