Title :
A novel method of estimating desired signal to undesired signal power ratio for one-cell-frequency-reuse SIMO/MIMO-OF/TDMA systems
Author :
Moriyama, Masafumi ; Harada, Hiroshi ; Sampei, Seiichi ; Funada, Ryuhei
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol., Kanagawa
Abstract :
In one-cell-frequency-reuse MIMO (multi input multi output) - OFDMA based TDMA (OF/TDMA) systems, we face a problem that communication is blocked by interferences from adjacent cells. To solve this problem, an AMC (adaptive modulation and coding) scheme that is controlled by estimating DUR (desired signal to undesired signal power ratio) would be most promising. However, there is no accurate DUR estimation method using spreading codes for OF/TDMA systems due to the asynchronous FFT so far. In this paper, we propose a novel DUR estimation method by adding IFFT and time-window and introducing CI (carrier interferometry). The proposed DUR estimation method can separate the desired signal from a received signal even if FFT is asynchronous
Keywords :
MIMO systems; adaptive codes; adaptive modulation; frequency allocation; frequency division multiple access; time division multiple access; MIMO systems; OFDMA systems; SIMO systems; TDMA systems; adaptive modulation and coding; carrier interferometry; desired signal to undesired signal power ratio; multi input multi output; one-cell-frequency-reuse; signal estimation; spreading codes; time-window; undesired signal power ratio; Adaptive control; Control systems; Frequency conversion; IP networks; Interchannel interference; MIMO; Modulation coding; Multiaccess communication; Programmable control; Time division multiple access;
Conference_Titel :
Wireless Communications and Networking Conference, 2006. WCNC 2006. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
1-4244-0269-7
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2006.1696575
