Name
Title | ||
|---|---|---|
Dual-Mode Low-Complexity Codebook Searching Algorithm and VLSI Architecture for LTE/LTE-Advanced Systems |
Abstract | ||
|---|---|---|
Codebook is a useful precoding technique for bandwidth limited systems because only few bits are required to feedback channel information. Many researchers propose several codebook selection criteria for linear receivers. However, these selection criteria are very computationally intensive, and most of them are not feasible for aperiodic feedback reporting in both LTE and LTE-Advanced (LTE-A) systems. Under the limited processing hardware and feedback delay constraints, low-complexity receivers with efficient codebook selection scheme are desirable. In this work, a low-complexity codebook searching engine is proposed to support both LTE and LTE-A operations. Also, it can be operated for both aperiodic and periodic feedback reporting. The properties and mutual correlations of the LTE and LTE-A codebooks are firstly analyzed. Then, a low-complexity grouping FFT-based codebook searching algorithm is proposed, which can be shared by LTE and LTE-A systems. Since the proposed algorithm is an algorithmic transformation, there is no performance loss. The proposed schemes have significant effect of reducing the number of multiplications by 56% compared with referenced works. Finally, a dual-mode low-complexity codebook searching engine with TSMC 90 nm is implemented. The IP size is 2.2 mm$^{2}$ and the equivalent gate count is 547.6 K. The operating frequency is 125 MHz. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1109/TSP.2013.2257764 | IEEE Transactions on Signal Processing |
Keywords | Field | DocType |
precoding technique,aperiodic feedback,low-complexity,vlsi,precoding,lte-lte advanced systems,processing hardware,linear receivers,encoding,low-complexity receivers,codebook,search problems,codebook searching engine,bandwidth limited systems,size 90 nm,feedback delay constraints,lte,radio receivers,vlsi architecture,dual mode low complexity codebook searching algorithm,long term evolution,feedback channel information,lte-a,dual mode low complexity codebook searching engine,frequency 125 mhz,lte-a systems,lte a | Mathematical optimization,Gate count,Search algorithm,Computer science,Real-time computing,Bandwidth (signal processing),Fast Fourier transform,Computer engineering,Very-large-scale integration,Precoding,LTE Advanced,Codebook | Journal |
Volume | Issue | ISSN |
61 | 14 | 1053-587X |
Citations | PageRank | References |
6 | 0.48 | 7 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yi-Hsuan Lin | 1 | 13 | 3.51 |
| Yu-Hao Chen | 2 | 16 | 3.32 |
| Chun-Yuan Chu | 3 | 23 | 4.33 |
| Cheng-Zhou Zhan | 4 | 123 | 9.71 |
| An-Yeu Wu | 5 | 801 | 81.68 |