Title :
Packet SS-CDMA modem with carrier frequency offset compensation
Author :
Yamaguchi, Aisuyoshi ; Takagi, Jun ; Oguma, Hiroshi ; Kim, Seong-Kweon ; Kameda, Suguru ; Nakase, Hiroyuki ; Isota, Yoji ; Tsubouchi, Kazuo
Author_Institution :
Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan
Abstract :
A new carrier frequency offset compensation algorithm for packet spread-spectrum code-division multiple-access (SS-CDMA) system is proposed. For evaluation of carrier frequency offset, 11-chip Barker codes were inserted into middle and end of the information block as pilot signals. Rotation direction and rotation amount due to carrier frequency offset are detected by phase differences between a preamble and pilot signals. Using the proposed algorithm, carrier frequency offset is evaluated by single packet. The compensation can be performed under burst transmission. We have evaluated bit error rate (BER) performance of packet SS-CDMA modem with the proposed algorithm by computer simulation. Under carrier frequency offset of less than 0.3 ppm, at the BER of 10-3, the degradation from the theoretical limit was found to be less than 0.2 dB.
Keywords :
IP networks; cellular radio; code division multiple access; codes; error statistics; modems; packet radio networks; spread spectrum communication; 11-chip Barker code; BER; bit error rate; burst transmission; carrier frequency offset compensation; code division multiple access; computer simulation; packet SS-CDMA modem; pilot signal; spread-spectrum system; Automatic frequency control; Bit error rate; Circuits; Computer simulation; Downlink; Frequency synchronization; Land mobile radio cellular systems; Large scale integration; Modems; Spread spectrum communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on
Print_ISBN :
0-7803-7822-9
DOI :
10.1109/PIMRC.2003.1259178
