DFT-SOFDM系统中一种新的跳频方法
doi: 10.3724/SP.J.1146.2007.00245
A New Frequency Hopping Method for DFT-SOFDM Systems
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摘要: 该文提出一种传输时间间隔(TTI，Transform Time Interval)内与传输时间间隔间联合跳频新方法，以解决EUTRA(Evolved UMTS Terrestrial Radio Access)上行链路多颗粒度用户及混合重传情况下跳频的问题。该方法根据用户的带宽需求与拉丁方计算得出跳频序列，控制子载波映射时各用户的子载波分配。这个方法适合任意传输带宽需求，既能保持系统单载波传输特性，又能避免数据包之间发生碰撞。仿真结果证明了其有效性。该方法在EUTRA上行链路中具有很好的应用前景。
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关键词:
- 傅里叶扩频正交频分复用(DFT-SOFDM) /
- 集中式频分多址(LFDMA) /
- 跳频技术 /
- 拉丁方
Abstract: This paper presents a new method of intra/inter-TTI frequency hopping in E-UTRA uplink. The hopping method decides the starting frequency according to Latin square and users frequency resource requirements. The method that can keep single carrier transmission and avoid collision at the same time is suitable for various transmission bandwidths. The conclusion is verified by computer simulation. This method will be used in E-UTRA uplink with a good prospect of application. -
[1] 3GPP TR 25.814 v7.1.0 (2006-10), Physical layer aspects forevolved UTRA [EB/OL]. [2] 3GPP, R1-063249, UL LFDMA with hopping [EB/OL]. [3] 3GPP, R1-062851, Frequency hopping for E-UTRA uplink,Ericsson [EB/OL]. [4] 3GPP, R1-062554, Uplink frequency hopping, LG Electronics[EB/OL]. [5] 3GPP, R1-062816, Comparison between distributed subcarrierallocation and sub-frame based frequency hopping[EB/OL]. [6] Golomb S W and Posner E C. Rook domains, Latin squares,Affine planes, and error-distributing codes [J].IEEE Trans.on the Information Theory.1964, 10(3):196-208 [7] Stamatiou K and Proakis J. A performance analysis of codedfrequency-hopped OFDM[C]. Proceedings of IEEE WCNC,2005, 2(2): 1132-1137. [8] Pottie G J and Calderbank A R. Channel coding strategiesfor cellular radio[J].IEEE Trans. on Veh. Technol.1995, 44(3):763-770 [9] Chen Jie. Fast hopping OFDM and packet-awareness coderdesign for wireless multimedia delivery[C]. ICME, 2003, 1(1):665-668. [10] Galda D and Rohling H A. Low complexity transmitterstructure for OFDM-FDMA uplink systems [A]. Proceedingsof IEEE VTC'02[C]. IEEE, 2002: 1737-1741. -
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