Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6945411 | Microelectronics Journal | 2016 | 11 Pages |
Abstract
In this paper, a new fully analog technique is proposed by means of which the adverse effects of frequency dependent gain/phase errors in quadrature transmitters are suppressed. Two separate phase and gain mismatch cancellation loops are implemented which search for the minimum side-band component. A new sign detection method is also introduced which makes sure the direction of the loop is correct. Analytical models and mathematical derivations have been presented which corroborates the circuit implementation. A proof of concept prototype using off-the-shelf components have also been measured which suggests 38-dB side-band rejection (SBR). Furthermore, the measured TX EVM and BER are improved by an order of magnitude for a QPSK-modulated input signal.
Keywords
Related Topics
Physical Sciences and Engineering
Computer Science
Hardware and Architecture
Authors
Ali Nikoofard, Siavash Kananian, Ehsan Hadizadeh, Ali Fotowat-Ahmady,