| Paper: | SPCOM-P5.9 | ||
| Session: | Synchronization | ||
| Time: | Wednesday, May 17, 10:00 - 12:00 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing for Communication: Signal detection, estimation, separation and equalization | ||
| Title: | THEORETICAL ANALYSIS OF TIMING ERROR IN A DIRECT TRANSMITTER SELF-CALIBRATION SYSTEM | ||
| Authors: | Zhiwen Zhu, Xinping Huang, Communications Research Centre Canada, Canada | ||
| Abstract: | This paper studies the performance of a least-square-based self-calibration technique for a direct frequency conversion quadrature modulator in the presence of timing error. The technique requires the in-phase (I) and quadrature (Q) signals and their corresponding instantaneous power measurement at the transmitter output to estimate the gain/phase/DC-offset coefficients. The time synchronization between the I/Q signals and the power measurement is important for accurate coefficient estimation. Here we theoretically analyze the effect of the time synchronization error on the coefficient estimation. It is shown by using Taylor series expansion that the estimation errors of the gain/phase/DC-offset coefficients will be proportional to $\tau^2$, where $\tau$ is the timing error. Numerical simulations are used to validate the analysis. | ||
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