Name
Abstract | ||
|---|---|---|
This paper is concerned with a uplink scheme for multicell large antenna systems. We study a channel estimation technique where partially decoded data is used to estimate the channel. We show that there are two types of interference components in this scheme that do not vanish even when the number of antennas grows to infinity. The first type, referred to as cross-contamination, is due to the correlation among the data signals from different users. The second type, referred to as self-contamination, is due to the dependency between the channel estimate and the estimation error. Cross contamination is in principle similar to pilot contamination in a conventional pilot-based channel estimation scheme, while self-contamination is unique for the data-aided scheme. For efficient use of the channel, the data part in a signaling frame is typically much longer than the pilot part for a practical system. Consequently, compared with pilot signals, data signals naturally have lower cross correlation. This fact reduces the cross-contamination effect in the data-aided scheme. Furthermore, self-contamination can be effectively suppressed by iterative processing. These results are confirmed by both analyses and simulations. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/TSP.2014.2321120 | IEEE Transactions on Signal Processing |
Keywords | DocType | Volume |
uplink scheme,iterative processing,signaling frame,radiofrequency interference,pilot-based channel estimation scheme,cellular radio,mobile antennas,data-aided channel estimation,cross-contamination,mimo communication,channel coding,antenna arrays,interference components,massive mimo system,least mean squares methods,self contamination,large antenna systems,cross contamination,data signals,estimation error,partially decoded data,antennas,multicell large antenna systems,data aided channel estimation,pilot contamination,self-contamination,iterative channel estimation and signal detection,data-aided channel estimation technique,correlation methods,channel estimation,pilot signals,large antenna system,mimo system,correlation,interference,contamination | Journal | 62 |
Issue | ISSN | Citations |
12 | 1550-3607 | 9 |
PageRank | References | Authors |
0.54 | 0 | 2 |