Name
Title | ||
|---|---|---|
Rx-Band Noise Reduction In All-Digital Transmitters With Configurable Spectral Shaping Of Quantization And Mismatch Errors |
Abstract | ||
|---|---|---|
This paper describes the first purely digital approach to reduce the receive band noise in digitally-intensive RF transmitters. The proposed solution applies bandpass delta-sigma modulation and dynamic element matching (DEM) to the receive band (RX-band) instead of the transmit band. This enables selective attenuation of the noise originating from amplitude quantization and static mismatches of the digital-to-analog converter (DAC), which would otherwise reach the transmitter output almost unattenuated. A highly configurable 4th-order noise transfer function is designed to achieve optimum attenuation in the programmable RX-band, while ensuring negligible degradation of the transmitted signal quality as well as stable operation of the tree structure DEM encoder. A general validation of DEM, independent from the duration of the DAC impulse response, is also presented. The proposed solution is verified through system-level simulations with LTE signals. In the presence of typical amplitude and timing mismatches, the RX-band noise can be reduced below -160 dBc/Hz without filtering after the DAC, thus potentially enabling SAW-less operation of all-digital transmitters. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/TCSI.2014.2335012 | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS |
Keywords | Field | DocType |
All-digital transmitter, bandpass delta-sigma modulation, dynamic element matching (DEM), mismatch shaping, programmable noise transfer function (NTF), receiver (RX)-band noise | Noise reduction,Transmitter,Noise floor,Filter (signal processing),Noise temperature,Electronic engineering,Noise shaping,Quantization (signal processing),Noise (radio),Electrical engineering,Mathematics | Journal |
Volume | Issue | ISSN |
61 | 11 | 1549-8328 |
Citations | PageRank | References |
0 | 0.34 | 0 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Kari Stadius | 1 | 68 | 23.73 |
| Jerry Lemberg | 2 | 6 | 2.96 |
| Marko Kosunen | 3 | 51 | 18.09 |
| Enrico Roverato | 4 | 12 | 4.20 |
| Jussi Ryynanen | 5 | 49 | 14.15 |