A Chunk by chunk-based allocation is an emerging subcarrier allocation in Single Carrier Frequency Division Multiple Access (SC-FDMA) due to its low complexity. In this paper, a combined userorder and chunk-order allocation for solving chunk allocation problem which minimizes the average BER of all users while improving the throughput in SC-FDMA uplink is proposed. The subcarrier grouping into ...

Queueing soft hando attempts in DS-CDMA cellular systems can cause di erent e ects on system performance, compared with the hando attempts in TDMA and FDMA systems. This is because CDMA link capacity depends on other user interference which includes the power of blocked soft hando attempts. The power level of blocked soft hando attempts may be large because it cannot be controlled by a target b...

Single carrier frequency domain multiple access (SC-FDMA) has been adopted for the 3GPP long-term evolution (LTE) uplink multiple access scheme due to the power consumption issue of mobile handsets. Like OFDMA in the downlink, SC-FDMA enables multiple users to be served simultaneously in the uplink. However, all subcarriers allocated to a single user must be contiguous in the frequency domain a...

This paper proposes a numerical method for characterizing the rate region achievable with frequency-division multiple access (FDMA) for a Gaussian multiple-access channel with intersymbol interference. The frequency spectrum is divided into discrete frequency bins and the discrete bin-assignment problem is shown to have a convex relaxation, making it tractable to numerical optimization algorith...

This paper describes a multiple access technique suitable for indoor wireless ATM networks that exploits both frequency division and time division techniques for channel re-use (i.e. FDMA/TDMA). The novel feature of the proposed technique is that co-ordinated, prioritised TDMA is supported for clusters of Access Point’s (AP’s) using measurement based time slot assignments. This has the advantag...

This paper gives an overview of radio interfaces devoted for high data rate Wireless Sensor Networks. Four aerospace applications of WSN are presented to underline the importance of achieving high data rate. Then, two modulation schemes by which High Data Rate can be achieved are compared : Multi carrier approaches, represented by the popular Orthogonal Frequency Division Multiplexing (OFDM) an...

Simultaneous routing and resource allocation has been considered in wireless networks for its performance improvement. In this paper we propose a cross-layer optimization framework for worst-case queue length minimization in some type of FDMA based wireless networks, in which the the data routing and the power allocation problem are jointly optimized with Fuzzy distributed H∞ control strategy ....

This paper investigates resource sharing strategies for point-to-multipoint (P2MP) distribution in next-generation digital subscriber line (DSL) networks. The latest DSL ITU standard, multi-gigabit fast access to terminals (MGfast) or G.9711, supports P2MP transmission as a new feature, which allows among multiple customer premises equipments (CPEs). It offers an optimized user experience by ef...

Orthogonal Frequency Division Multiple Access (OFDMA) is today a part of many standard specifications. Despite its attractive features, it has two main drawbacks when employed in the uplink: The high peak-to-average power ratio inherited from Orthogonal Frequency Division Multiplexing (OFDM) and the inherent frequency diversity loss. The loss of frequency diversity can be alleviated by precodin...