Abstract
This work presents a dual-band polar digital transmitter (P-DTX) based on a digitally controlled two-point edge interpolation digital-to-time converter, which is capable of supporting Wi-Fi 6 applications. The proposed P-DTX is fabricated in a standard 28-nm CMOS process. The 2.5/5GHz digital power amplifiers (DPAs) reach a maximum power (PMAX)/power efficiency (PE) of 27 dBm/53% and 27dBm/37%, respectively. The transmitter meets an error vector magnitude (EVM)/DPA PE/total TX power dissipation of -30.5 dB/33%/532 mW for the low band and -29 dB/26%/718 mW for the high band at 6-dB backoff (dBBO) from PMAX. An EVM as low as -40 dB is achieved using digital pre-distortion at 7-8 dBBO, for 20-160-MHz signal bandwidths, thus demonstrating MCS11 1024-QAM OFDM Wi-Fi 6 operation.
| Original language | English |
|---|---|
| Article number | 9210574 |
| Pages (from-to) | 3414-3425 |
| Number of pages | 12 |
| Journal | IEEE Journal of Solid-State Circuits |
| Volume | 55 |
| Issue number | 12 |
| DOIs | |
| State | Published - 1 Dec 2020 |
| Externally published | Yes |
Keywords
- Digital TX
- Wi-Fi 6
- digital power amplifier (DPA)
- digital-to-time converter (DTC)
- polar TX
ASJC Scopus subject areas
- Electrical and Electronic Engineering
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