Citation
Abstract
This article presents a candidate pre-A/D filter bandwidth versus data rate design for the Multimegabit Telemetry Demodulator/Detector, which is based on considerations of A/D bias, quantization errors, and automatic gain control (AGC) effects, as well as the deleterious effects of filtering. Two methods of gain control of the input level to the A/D converter are considered. The first method uses a particular value of gain, according to which bandwidth is selected. The second method uses a second narrowband noncoherent AGC (in the LPF bandwidth} to attempt to keep the A/D input level constant. This second method reduces the BER degradation slightly but appears to be more difficult to implement.
Details
- Volume
- 42-51
- Published
- June 15, 1979
- Pages
- 39–46
- File Size
- 522.6 KB