Download OFDM-Based Broadband Wireless Networks: Design and by Hui Liu PDF

By Hui Liu

OFDM-based Broadband instant Networks covers the newest technological advances in electronic broadcasting, instant LAN, and cellular networks to accomplish excessive spectral potency, and to fulfill height specifications for multimedia site visitors. The e-book emphasizes the OFDM modem, air-interface, medium access-control (MAC), radio hyperlink protocols, and radio community making plans.

An teacher aid FTP web site is offered from the Wiley editorial department.Content:
Chapter 1 advent (pages 1–12):
Chapter 2 OFDM basics (pages 13–30):
Chapter three PHY Layer concerns — method Imperfections (pages 31–66):
Chapter four PHY Layer concerns – Spatial Processing (pages 67–99):
Chapter five a number of entry keep watch over Protocols (pages 100–137):
Chapter 6 OFDMA layout issues (pages 138–165):
Chapter 7 Multi?Cell Frequency making plans (pages 166–190):
Chapter eight Appendix (pages 191–241):

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Extra info for OFDM-Based Broadband Wireless Networks: Design and Optimization

Example text

Le Floch, M. Alard, and C. Berrou, “Coded Orthogonal Frequency Division Multiplex,” Proceedings of the IEEE, 83, 6 , pp. 982-996, 1995. [6] S. Hara, and R. Prasad, “Overview of Multicarrier CDMA,” IEEE Communications Magazine, 35, 12, pp. 126-133, 1997. [7] S. B. Weinstein and P. M. Ebert, “Data transmission by frequency division multiplexing using the discrete fourier transform,” IEEE B a n s . Communications, vol. COM-19, pp. 628-634, Oct. 1971. [8] B. Hirosaki, “An Orthogonally Multiplexed QAM System Using the Discrete Fourier Transform,” IEEE Trans.

The low-rank 2D estimator essentially reduces the 2D filtering to the vicinity of the channel response [13]. More specifically, w(k,l,m,n) = 0; if Ilc - ml > Am or II - n1 > An Am and An are selected based on the channel coherence time and coherence bandwidth, as well as the computation complexity the channel estimator can afford. Alternatively, the channel estimation complexity can be reduced by partitioning the 2D filtering into separate time-domain filtering and frequency dG main filtering. The order with which the two l-D filtering operations are performed depends on the actual pilot pattern.

To recover { ~ ( n ) the needs to be estimated and compensated before performing the DFT. 2 Pilot-based estimation The initial carrier acquisition in OFDM often relies on largely concentrated pilots that are periodically inserted. The simplest scenario involves one or more pilot OFDM symbol(s) with the signal vector s (modulated on all subcarriers) known to the receiver. 16d/e for example, dedicated pilots and preambles are available for timing and frequency synchronization. Assume one pilot OFDM symbol is available.

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