Radio interface performance of EDGE, a proposal for enhanced data rates in existing digital cellular systems

Schramm, Peter; Andreasson, H.; Edholm, C.; Edvardsson, N.; Hook, M.; Javerbring, S.; Müller, Fabian de Ponte; Sköld, Johan

doi:10.1109/vetec.1998.686403

Cited by 73 publications

(16 citation statements)

References 3 publications

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“…The advantage of adaptive modulation combined with a power control scheme has been presented in various contexts, e.g., the single-user case in [11], the multiuser case in [12]. We also note that current proposals for third-generation wireless systems include link adaptation [13], [14].…”

mentioning

confidence: 92%

Data throughputs using multiple-input multiple-output (MIMO) techniques in a noise-limited cellular environment

Catreux¹,

Driessen

Greenstein

2002

IEEE Trans. Wireless Commun.

152

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Abstract-We present a general framework to quantify the data throughput capabilities of a wireless communication system when it combines: 1) multiple transmit signals; 2) adaptive modulation for each signal; and 3) adaptive array processing at the receiver. We assume a noise-limited environment, corresponding to either an isolated cell or a multicell system whose out-of-cell interference is small compared with the thermal noise. We focus on the user data throughput, in bits per second/Hertz (bps/Hz), and its average over multipath fading, which we call the user spectral efficiency. First, an analysis method is developed to find the probability distribution and mean value of the spectral efficiency over the user positions and shadow fadings, both as a function of user distance from its serving base station and averaged over the cell coverage area. We assume fading conditions and receiver processing that lend themselves to closed-form analysis. The resulting formulas are simple and straightforward to compute, and they provide a number of valuable insights. Next, we run Monte Carlo simulations, both to confirm the analysis and to treat cases less amenable to simple analysis.A key contribution of this paper is a simple formula for the mean spectral efficiency in terms of the propagation exponent, mean signal-to-noise ratio at the cell boundary, number of antennas, and type of coding. Under typical propagation conditions, the mean spectral efficiency using three transmit and three receive antennas ranges from 19.2 bps/Hz (uncoded) to 26.8 bps/Hz (ideally coded), highlighting the potential benefits of multiple transmissions combined with adaptive techniques. This is much higher than the spectral efficiencies for a link using a single transmitter and a threefold receive diversity under the same conditions, where the range is from 8.77 bps/Hz to 11.4 bps/Hz. Moreover, the latter results are not nearly as practical to achieve, as they call for large signal constellations that would be highly vulnerable to impairments.

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mentioning

confidence: 92%

Data throughputs using multiple-input multiple-output (MIMO) techniques in a noise-limited cellular environment

Catreux¹,

Driessen

Greenstein

2002

IEEE Trans. Wireless Commun.

152

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“…The new additional mechanism parameters used in these simulations are: K = 16, Λ =2 and NOK signal can indicate the number of required R-blocks. The BLER is calculated, with frequency hopping in a typical urban environment, in function of Carrier-to-Interface ratio (C/I) in [11]. Two channel models are proposed: "constant" channel quality and "time varying" channel quality.…”

Section: Simulation Resultsmentioning

confidence: 99%

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Ajib

Godlewski

2001

Wireless Networks

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“…The 802.11 capability has been included as standard equipment in many laptop computers and hand-held devices. The 11b WLAN supports data rates up to 11 Mbps, far exceeding that of the third generation (3G) wireless networks such as EDGE [SAE98] and W-CDMA networks [HT00].…”

Section: Introductionmentioning

confidence: 99%

“…In typical cellular networks including the GSM [R96] and EDGE network [SAE98], two separate radio channels, namely the traffic and control channels, are used to carry user data and control traffic, respectively. Typically, terminals access the control channels to send control information via some contention mechanism.…”

Section: Introductionmentioning

confidence: 99%

Frequency assignment for IEEE 802.11 wireless networks

Leung¹,

Kim

2003

2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484)

115

109

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-The IEEE 802.11 standard specifies both radio and MAC protocol design. We observe that its CSMA protocol helps avoid much of co-channel interference by sharing radio resources in time at the potential expense of degraded network performance. Due to the coupling between the physical and MAC layers, conventional frequency allocation methods for typical cellular networks cannot be applied directly to the 802.11 networks.In this paper, by focusing on interactions among access points, we formulate the channel assignment problem for the 802.11 network, considering the traffic load at the MAC layer, and prove that the problem is NP-complete. In light of computational complexity, a heuristic algorithm is proposed and analyzed. The algorithm is then applied to two cellular settings with known optimal assignments for verification. For one of the settings, the proposed technique generates the optimal channel assignment. As for the second case of a large network, although only a suboptimal solution is obtained by the algorithm, it is shown to be excellent. Thus, as the 802.11 networks are widely deployed, the proposed method can serve as a valuable tool for frequency planning of networks with non-uniform coverage and load.

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Radio interface performance of EDGE, a proposal for enhanced data rates in existing digital cellular systems

Cited by 73 publications

References 3 publications

Data throughputs using multiple-input multiple-output (MIMO) techniques in a noise-limited cellular environment

Data throughputs using multiple-input multiple-output (MIMO) techniques in a noise-limited cellular environment

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Frequency assignment for IEEE 802.11 wireless networks

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