| 摘要 |
<p>Received data signals in digital form are sampled a plurality of times during each bit interval and weighted to enhance the statistical effect of a predetermined intermediate amplitude range prior to accumulation over a bit time to obtain an initial average indication of bit value. Plural repetitions of the same bit received at different times are similarly processed and the average weighted according to received signal strength at the time of reception. Then the weighted averages are accumulated in a two"s complement arithmetic fashion so that the accumulation sign bit binary signal state indicates the binary value of the bit. In one embodiment, the initially derived multiple samples (22) of each bit are converted to in-phase and quadrature-phase versions (27) prior to the sample accumulation step; and the separate accumulations (28, 29) of each version are utilized to obtain an arctangent value (30) for adjusting the phase of a local clock (37) to that of the received data (20). </p> |
