Slow frequency-hop TDMA/CDMA for macrocellular personal communications

Rasky, P.D.; Chiasson, G.M.; Borth, D.E.; Peterson, Roger L.

doi:10.1109/mpc.1994.298463

Cited by 25 publications

(9 citation statements)

References 9 publications

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“…Basically, Costas arrays for advanced hopping schemes have been introduced by Einarsson [6]. Code hopping in a spread spectrum system [7] and frequency hopping [8] have been proposed. However, these hopping mechanisms, which have been used only for frequency (or code) diversity, are based on exclusive hopping patterns in which frequency (or code) hopping patterns are designed to have different patterns among users at a given time.…”

Section: Introductionmentioning

confidence: 99%

“…The seed number may be based on each MS identifier (ID) using an electronic serial number (ESN). In dedicated resource allocation/multiplexing schemes (non-hopping schemes) and conventional hopping schemes [6][7] [8], data symbols for an MS are transmitted using a hopping pattern of identical resource indices, and exclusively hopped resource indices, respectively. Thus, the number of maximum allocatable downlink channels can not exceed the number of orthogonal resources.…”

Section: Introductionmentioning

confidence: 99%

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Performance Analysis of Orthogonal Frequency and Code Hopping Multiplexing

Moon

Kim

Sung

2007

IEEE Trans. Wireless Commun.

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Beyond-3G wireless communication systems should support packet traffic with both low/medium rate and high rate services. Scheduling-based resource allocation schemes may cause a problem in accommodating low/medium rate services due to a rate mismatch and a large signaling overhead. Dedicated resource allocation/multiplexing schemes are also inadequate for accommodating packet-type traffic that is characterized by low channel activity and high burstiness. Therefore, we propose a new orthogonal frequency and code hopping multiplexing (OFCHM) scheme for downlink multiplexing to provide efficient support of packet traffic with low/medium data rates in a spread OFDM environment. The performance of the proposed scheme is evaluated in terms of the statistical multiplexing gain, the block error rate, and the overall capacity by using both an analytical approach and simulation. The proposed scheme yields a larger overall downlink capacity than a dedicated resource allocation/multiplexing scheme. A comparison study with the variable spreading factor-orthogonal frequency and code division multiplexing (VSF-OFCDM) system through system-level simulations is also performed. The comparison results show that the OFCHM system yields better performance than the VSF-OFCDM system in packet delay, packet delay variance, and fairness, and has a system throughput advantage with low/medium rate services.Index Terms-OFDM, spread OFDM, multiplexing, orthogonal frequency and code hopping multiplexing, variable spreading factor-orthogonal frequency and code division multiplexing (VSF-OFCDM).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Orthogonal Frequency and Code Hopping Multiplexing

Moon

Kim

Sung

2007

IEEE Trans. Wireless Commun.

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“…Generally, system-level simulation is performed separately from link-level simulation [12]. The link-level simulation result depends on physical layer techniques including modulation order, and channel code rate.…”

Section: A System-level Simulation Methodologymentioning

confidence: 99%

“…This effect is considered by a capacity degradation factor of 1 2 in Eq. (12). According to the similar procedure to the cooperative scheduling type I, the system capacity of cooperative scheduling type II, C cs2 sys , can be written as…”

Section: • Channel Service Ratementioning

confidence: 99%

Hybrid scheduling scheme for a cooperative relay system in heterogeneous traffic environments

Kim

Moon

Sung

2009

IEEE Trans. Wireless Commun.

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We propose a hybrid scheduling scheme which can efficiently support various types of traffic in a cooperative relay system of downlink cellular networks. The hybrid scheduling scheme harmonizes the shared-channel resource allocation scheme and dedicated-channel resource allocation scheme to accommodate various traffic in heterogeneous traffic environments. We show that the proposed scheme significantly improves the system performance in terms of system throughput in heterogeneous traffic environments through the analysis of the system capacity and throughput.

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“…Motorola has investigated innovative applications of frequency hopping for cellular systems [13]. Ericsson has reported analytical studies and simulations of frequency-hopping GSM [14]- [16].…”

Section: Introductionmentioning

confidence: 99%

Dynamic frequency hopping in cellular systems with network assisted resource allocation

Kostic

Qiu²,

Chawla³

et al.

VTC2000-Spring. 2000 IEEE 51st Vehicular Technology Conference Proceedings (Cat. No.00CH37026)

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Abstract-We examine techniques for increasing spectral efficiency of cellular systems by using slow frequency hopping (FH) with dynamic frequency-hop (DFH) pattern adaptation. We first present analytical results illustrating the improvements in frequency outage probabilities obtained by DFH in comparison with random frequency hopping (RFH). Next, we show simulation results comparing the performance of various DFH and RFH techniques. System performance is expressed by cumulative distribution functions of codeword error rates. Systems that we study incorporate channel coding, interleaving, antenna diversity, and power control. Analysis and simulations consider the effects of path loss, shadowing, Rayleigh fading, cochannel interference, coherence bandwidth, voice activity, and occupancy. The results indicate that systems using DFH can support substantially more users than systems using RFH.Index Terms-Cellular, code-division multiple access (CDMA), dynamic channel allocation (DCA), dynamic channel assignment, EDGE, frequency hopping, orthogonal frequency-division multiplexing (OFDM), spectral efficiency, wireless.

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Slow frequency-hop TDMA/CDMA for macrocellular personal communications

Cited by 25 publications

References 9 publications

Performance Analysis of Orthogonal Frequency and Code Hopping Multiplexing

Performance Analysis of Orthogonal Frequency and Code Hopping Multiplexing

Hybrid scheduling scheme for a cooperative relay system in heterogeneous traffic environments

Dynamic frequency hopping in cellular systems with network assisted resource allocation

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