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VOFDM Broadband Wireless Transmission and Its Advantages over Single Carrier Modulation
 

Summary: VOFDM Broadband Wireless Transmission and Its Advantages
over Single Carrier Modulation
Ender Ayanoglu, VK Jones, Gregory G. Raleigh, James Gardner, Derek Gerlach, Karim Toussi
Cisco Systems
Abstract- In this paper we describe a coding, modulation,
and spatial processing technique for fixed broadband wireless
Internet access applications and provide examples of its
performance. This technique is built on Orthogonal Frequency
Division Multiplexing (OFDM) and is known as Vector OFDM
(VOFDM). We compare VOFDM with conventional Single
Carrier Modulation (SCM), and show that it provides
substantial performance improvements over SCM.
I. INTRODUCTION
Orthogonal Frequency Division Multiplexing (OFDM) is a
modulation technique whereby the digital message stream is
divided into parallel streams and each stream is carried at a
different frequency, modulating an orthogonal signal set.
OFDM employs coding both in time and across different
frequencies in order to exploit diversity in the time and
frequency domains. As a result, OFDM can mitigate against

  

Source: Ayanoglu, Ender - Department of Electrical and Computer Engineering, University of California, Irvine

 

Collections: Engineering