Reduction of other-cell interference with integrated interference cancellation/power control

Hatrack, P.; Holtzman, J.M.

doi:10.1109/vetec.1997.605877

Cited by 18 publications

(3 citation statements)

References 4 publications

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“…It will be shown in Section IV that if the estimation error is considered when developing a power control distribution, a sizeable amount of estimation error can be tolerated while still maintaining robust bit-error rate (BER) performance at an increased spectral efficiency. In addition, extending the work of [4] and [5], it will be shown in Section V that if the users' relative distances from the cell are considered when assigning powers, OCI can be reduced by approximately an order of magnitude over equal power CDMA systems such as IS-95 and 3G CDMA. In Section VI, the spectral efficiency of a SIC …”

Section: Introductionmentioning

confidence: 88%

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Optimum power control for successive interference cancellation with imperfect channel estimation

Andrews

Meng

2003

IEEE Trans. Wireless Commun.

150

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Successive interference cancellation, in conjunction with orthogonal convolutional codes, has been shown to approach the Shannon capacity for an additive white Gaussian noise channel (Viterbi: 1990). However, this requires highly accurate estimates for the amplitude and phase of each user's signal. In this paper, we derive an optimal power control strategy specifically designed to maximize the overall capacity under the constraint of a high degree of estimation error. This power control strategy presents a general formula of which other power control algorithms are special cases. Even with estimation error as high as 50%, capacity can be approximately doubled relative to not using interference cancellation. In addition, when properly applied to multicell mobile networks, this power control scheme can reduce the handset transmit power, and therefore other-cell interference, by more than an order of magnitude.Index Terms-Code-division multiple access (CDMA), interference cancellation, multiuser detection (MUD), power control, superorthogonal codes.

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Section: Introductionmentioning

confidence: 88%

“…The received signal (4) is the sum of the transmitted signals delayed by their respective propagation times (assumed here to be an integer multiple of the sample interval), plus additive noise , which has noise power . Path loss is neglected throughout the paper.…”

Section: B Channelmentioning

confidence: 99%

Optimum power control for successive interference cancellation with imperfect channel estimation

Andrews

Meng

2003

IEEE Trans. Wireless Commun.

150

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“…However, most multiuser detection techniques have been developed and/or analyzed without considering the power control. Recently, combining power control and multiuser detection for CDMA has been studied in [6,7,8,91. In these works, power control is applied in order to provide an equal bit-error-rate (BER) after interference cancellation (IC).…”

Section: Introductionmentioning

confidence: 99%

Combined power control and successive interference cancellation in DS/CDMA communications

Kim¹,

Kim

The 5th International Symposium on Wireless Personal Multimedia Communications

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It is well known that code division multiple access (CDMA) systems are interference-limited, and that the performance of CDMA systems depends on the success in managing the interference. Interference managements in terms of power control and interference cancellation have been investigated extensively in the past. In this paper, we consider combining power control (PC) and successive interference cancellation (SIC), and show that the performance can be significantly improved by controlling the transmission power such that received power levels are geometrically distributed. We also show that the dynamic range of transmission power levels can be reduced by combining P C with SIC, thereby alleviating a stringent requirement on power amplifier and step sizeffrequency of power control commands.

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Seskar¹,

Mandayam²,

Hatrack³

1999

International Journal of Wireless Information Networks

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Reduction of other-cell interference with integrated interference cancellation/power control

Cited by 18 publications

References 4 publications

Optimum power control for successive interference cancellation with imperfect channel estimation

Optimum power control for successive interference cancellation with imperfect channel estimation

Combined power control and successive interference cancellation in DS/CDMA communications

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