Name
Title | ||
|---|---|---|
Cross-Validation Estimation for Frequency-Dependent I/Q Imbalance in MIMO-OFDM Receivers |
Abstract | ||
|---|---|---|
The effects of variation in RF, such as I/Q imbalance and filter mismatch, are extremely important for OFDM wireless accesses. This work presents a low-computational estimation of I/Q imbalances with filter mismatches to improve performance in MIMO-OFDM receivers. For N驴脳驴N MIMO-OFDM systems, the proposed cross-validation estimation is such that, only N驴+驴1 preambles are required to extract the mismatches of filters, gains and phases. With the estimated parameters, frequency-domain filters are exploited to correct frequency-dependent I/Q imbalances. Through performance evaluation of a 2驴脳驴2 MIMO-OFDM system, with ideal channel estimations this study incurs a SNR loss of 1---1.2 dB to maintain a 10% PER at 1-dB gain error, 10°-phase error and the worst 180°-filter mismatch. In addition, this algorithm is well-matched to IEEE 802.11n and new specifications discussed in IEEE 802.11 VHT study group. |
Year | DOI | Venue |
|---|---|---|
2010 | 10.1007/s11265-009-0403-y | Signal Processing Systems |
Keywords | Field | DocType |
Filter mismatch,I/Q imbalance,Cross validation,Frequency-Dependent Imbalance (FDI),MIMO-OFDM | MIMO-OFDM,Wireless,Computer science,Control theory,Communication channel,Real-time computing,Electronic engineering,Cross-validation,Orthogonal frequency-division multiplexing | Journal |
Volume | Issue | ISSN |
60 | 1 | 1939-8018 |
Citations | PageRank | References |
2 | 0.38 | 8 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Wei-Chi Lai | 1 | 16 | 2.60 |
| Ta-Yang Juan | 2 | 6 | 0.81 |
| Terng-Yin Hsu | 3 | 46 | 13.82 |
| Sheng-lun Chiou | 4 | 3 | 0.87 |