In the present work it was shown for the first time that the dependence of the dynamic range of the PGC technique on low-pass filters passbands is nonlinear for large input signal amplitudes because of low-pass filters passbands restrictions.
It can be seen that the input signal is applied to transistor [T.sub.1], and the output current is divided through transistors [T.sub.2] and [T.sub.3].
If [f.sub.1] = [f.sub.2] and the magnitude, [V.sub.2], of the reference frequency is kept constant, the filtered PSD output will be: the DC signal is proportional to the input signal amplitude [V.sub.1] and to the cosine of the angle , [phi], between the signal and reference.
It is clear from Figure 1 that for every input signal [??](n) = u(n) + [DELTA]u(n), the filter produces an estimated output y(n) = [w.sup.T.sub.n][a.sub.n], which is compared with [??](n) to produce a least squares error signal e(n) = y(n) - [??](n).
A typical ADC works by comparing the voltage of an external analog input signal with an internally generated reference level to convert to a digital value.
In this paper we propose a new BPSK signal receiver where the frequency offset between the input signal and the fixed frequency reference carrier in the receiver does not degrade the performance compared to the ideal coherent BPSK signal reception.