A Novel Interference Cancellation Technique for Non-Orthogonal Multiple Access (NOMA)

Hacı, Hüseyin; Zhu, Huiling; Wang, Jiangzhou

doi:10.1109/glocom.2015.7417128

Cited by 11 publications

(9 citation statements)

References 21 publications

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“…where Var(N n ) is the variance of the noise. (12) shows that the SINR at asynchronous NOMA is a function of the accuracy of the most recent detection of interferers' symbols and the relative time offset between users. The desired symbol is detected in error when the power of residual interference plus noise exceeds half of the distance between two nearest constellation points.…”

Section: A Received Signal and Average Ber Analysismentioning

confidence: 99%

“…Substituting (21) into (12) and (12) into (15), the conditional error probability is obtained as (22). Then, substituting (22) into (17) we obtain P(e…”

Section: A Received Signal and Average Ber Analysismentioning

confidence: 99%

“…the T-SIC procedure P(e 21 [1]) is conditioned on the permutation of that detection result. Then, let the 1 st permutation be {e (12) and (12) into (15) we obtain P(e…”

Section: A Received Signal and Average Ber Analysismentioning

confidence: 99%

“…It is seen that by suppressing the interference from all overlapping symbols of the co-channel user, T-SIC technique can provide low BER to both users for all considered modulation levels when received power ratio of users becomes large. Thus for reliable NOMA communications, it is crucial to handle the asynchronous overlapping symbols, and users need to have large received power ratio [12]. When the power ratio between users increases, the 1 st user's signal become much stronger than the 2 nd user's signal and many of the 1 st user's symbol estimates are correct with high probability.…”

Section: Figs 5 -8 Show the Ber Performance Of T-sic Andmentioning

confidence: 99%

“…The asynchronous communication requires information from multiple symbols when SIC is exploited. Detection and IC performances are significantly degraded if complete information of signals (desired and interfering) are not known in asynchronous communications [12], [13]. Therefore it is important to investigate NOMA in asynchronous communications.…”

Section: Introductionmentioning

confidence: 99%

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Performance of Non-orthogonal Multiple Access With a Novel Asynchronous Interference Cancellation Technique

Hacı

Zhu

Wang

2017

IEEE Trans. Commun.

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123

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The non-orthogonal multiple access (NOMA) allows one subcarrier to be allocated to more than one user at the same time in an orthogonal frequency division multiplexing (OFDM) system. NOMA is a promising technique to provide high throughput due to frequency reuse within a cell. In this paper, a novel interference cancellation (IC) technique is proposed for asynchronous NOMA systems. The proposed IC technique exploits a triangular pattern to perform the IC from all interfering users for the desired user. The bit error rate (BER) and capacity performance analysis of an uplink NOMA system with the proposed IC technique is presented, along with the comparison to orthogonal frequency division multiple access (OFDMA) systems. The numerical and simulation results show that the NOMA with the proposed asynchronous IC technique outperforms the OFDMA. It is also shown that employing iterative IC provides significant performance gain for NOMA and the number of required iterations depends on the modulation level and the detection method. With hard-decision, two iterations are sufficient, however with soft-decision, two iterations are enough only for low modulation level, and more iterations are desirable for high modulation level.

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Section: A Received Signal and Average Ber Analysismentioning

confidence: 99%

“…Substituting (21) into (12) and (12) into (15), the conditional error probability is obtained as (22). Then, substituting (22) into (17) we obtain P(e…”

Section: A Received Signal and Average Ber Analysismentioning

confidence: 99%

“…the T-SIC procedure P(e 21 [1]) is conditioned on the permutation of that detection result. Then, let the 1 st permutation be {e (12) and (12) into (15) we obtain P(e…”

Section: A Received Signal and Average Ber Analysismentioning

confidence: 99%

Section: Figs 5 -8 Show the Ber Performance Of T-sic Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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