| 摘要 |
A wideband receiver is provided for fully covering a desired band with only one mixer and one local oscillator. The wideband receiver advantageously utilizes the inherent aliasing characteristics of the sampling process taking place in the analog-to-digital converter to achieve full coverage of the desired band. More particularly, the wideband receiver is directed to fully covering the A-band of the AMPS frequency plan by analog-to-digitally converting two separate parts of a spectrum input to the wideband receiver where said spectrum has a total bandwidth greater than the Nyquist frequency of the analog-to-digital converter without any individual frequency transposition of each spectra part before being input to the analog-to-digital converter. The analog-to-digital converter aliases the transposed desired separate frequency bands to fulfill the Nyquist criteria even when a sampling frequency of the analog-to-digital converter is less than twice the bandwidth of the spectrum. As a result, the wideband receiver minimizes the number of analog parts used so that the wideband receiver is smaller, consumes less power and has a higher manufacturing yield. |
