UHF/L-Band monolithic direct digital receiver

Details UHF/L-Band monolithic direct digital receiver UHF/L-Band monolithic direct digital receiver

1993-10-18

1996-05-14

Chin, Stephen

Pulse or digital communications

Receivers

329314, 4551882, 3647241, H03K 900, H04L 2706, H04L 2714, H04L 2722

Patent

active

055175295

ABSTRACT:
A monolithic direct digital UHF/L-Band receiver for receiving and processing a UHF/L-Band analog signal and deriving digitized samples, the receiver operating in a tuning frequency range centered at a center frequency and having a baseband frequency, a lower bandedge frequency, and an upper bandedge frequency. The receiver comprises: a substrate; an analog-to-digital converter, mounted on the substrate, for digitally sampling at a sample rate the UHF/L-Band analog signal; a heterodyning circuit, coupled to the analog-to-digital converter and mounted on the substrate, for mixing the digitally sampled signal with a mixing signal thereby shifting the center frequency of the tuning frequency range of the sampled signal to the baseband frequency; and means, coupled to the heterodyning circuit and mounted on the substrate, for decimation filtering and decimating the mixed signal to obtain a second sample rate lower than the sample rate.

REFERENCES:
patent: 4020332 (1977-04-01), Crochiere et al.
patent: 4709270 (1987-11-01), Mehrgardt
patent: 4972357 (1990-11-01), Morel
patent: 5043933 (1991-08-01), Boutaud et al.
patent: 5051981 (1991-09-01), Kline
patent: 5079734 (1992-01-01), Riley
patent: 5325318 (1994-06-01), Harris
Eugene B. Hogenaur, "An Economical Class of Digital Filters For Decimation and Interpolation," IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-29, No. 2, Apr. 1981, pp. 155-162.
Wilson et al., "A Single-Chip VHF and UHR Receiver for Radio Paging," IEEE Journal of Solid State Circuits, vol. 26 No. 12 Dec. 1991. pp. 1944-1950.

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