OFDMA as the Technology for the Next Generation Mobile Wireless Internet

Abstract

The development of wireless systems, with the profound focus on the Internet, and mobile computing platforms has generated much interest in mobile data network access, particularly the Broadband wireless communication system. The choice for the appropriate technologies that will specifically suit the applicability for the Next Generation mobile wireless internet system will be based on various factor from high speed connectivity to mobility. Since OFDMA (Orthogonal Frequency Division Multiple Access), based on OFDM, can overcome signaling transmission barriers and increase transmission speed, while coping with unpredictable changes of the radio frequency environment, it is well suited for mobility applications in the wireless broadband network.

Design and Performance Evaluation of OFDM-Based Wireless Services Employing Radio over Optical Wireless Link

“…OFDM is also being considered in IEEE802.20a, a standard in the making for maintaining high-bandwidth connections to users moving at speeds up to 60 mph [12], [13]. OFDM is considered a potential candidate for the next-generation mobile wireless systems [14], [15]. This paper presents an OFDM-Based Wireless Services for indoor RF sensitive area.…”

Chaotic sequences for reduction of PAPR in OFDMA system

“…In OFDMA system total bandwidth is divided into spectrally overlapping narrowband subchannels and subcarriers are allocated using assignment map defined by subcarrier allocation scheme [3]. Simultaneous transmission of multiple data rate can be achieved by using variable spreading factor while keeping the transmission bit rate same for all carriers.…”

Performance analysis of an OFDM transmission system based on IEEE802.11a

“…OFDM (Orthogonal Frequency Division Multiplexing) is a kind of MCM (Multi-carrier modulation) technique called DMT (Discrete Multi-tone) method hand its application has been expanded through the development of DSP and VLSI technology [1]. This technique may improve both band and power efficiency.…”

“…1 [1]. The source data are random signal series produced by Bernouli distribution signal generator first.…”