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This paper proposes an adaptive frequency-domain (spectrum) puncturing method for turbo coded single-carrier transmission. The proposed method is based on previous work on frequency-domain puncturing at the transmitter and turbo equalization at the receiver. While we previously assumed fixed frequency-component puncturing, the newly proposed method adaptively selects the frequency components to be...
This paper comprehensively compares our two previously reported inter-cell interference coordination (ICIC) methods based on frequency block-dependent coordinated transmission power control (TPC) in non-orthogonal access with a successive interference canceller (SIC) in the cellular uplink. First ICIC method uses different target signal-to-noise ratios (SNRs) and compensation factors in fractional...
This paper proposes a one-tap frequency-domain transmitter filtering method that assumes channel knowledge at the transmitter for turbo coded single-carrier transmission with our previously reported frequency-domain puncturing at the transmitter and turbo equalization at the receiver. In coded single carrier transmission in a frequency-selective fading channel, inter-symbol-interference (ISI) severely...
Aiming at a better tradeoff between the system frequency efficiency measured by the mean user throughput and the user fairness measured by the cell-edge user throughput, we propose applying fractional frequency reuse (FFR) and weighted proportional fair (PF)-based multiuser scheduling to non-orthogonal access with a successive interference canceller (SIC) in the cellular downlink. We also propose...
This paper investigates the system-level throughput of non-orthogonal access with a successive interference canceller (SIC) in the cellular downlink assuming proportional fair (PF)-based radio resource (bandwidth and transmission power) allocation. The purpose of this study is to examine the possibility of applying non-orthogonal access with a SIC to the systems beyond the 4G (thus IMT-Advanced) cellular...
This paper investigates the system-level throughput performance of non-orthogonal access with minimum mean squared error-based linear filtering followed by a successive interference canceller (MMSE-SIC) in the cellular uplink. Although non-orthogonal access employing the MMSE-SIC achieves the entire region of the multiuser capacity in a multiple access channel (MAC), which should be beneficial in...
This paper proposes a simple decentralized cell association method for heterogeneous networks, where low transmission-power pico or femto base stations (BSs) are overlaid onto a high transmission-power macro BS. The focus of this investigation is on the downlink and the purpose of the cell association is to achieve better user fairness, in other words, to increase the minimum average user throughput...
This paper investigates the enhancement of cell-edge user throughput by using non-orthogonal access with a successive interference canceller (SIC) in the cellular uplink compared to orthogonal access, which is widely used in 3.9 and 4G mobile communication systems. Since both the total user throughput and cell-edge user throughput are important in a real system, we compare the cell-edge user throughput,...
This paper proposes a channel-dependent adaptive spreading code selection method in downlink multicarrier code division multiple access (MC-CDMA). The proposed method is compared to the conventional MC-CDMA and orthogonal frequency division multiple access (OFDMA). First we show that the signal-to-noise and interference power ratio (SINR) after minimum mean squared error (MMSE)-based equalization...
This paper proposes synchronous transmission with delay diversity and soft-combining reception in the same node B for the paging channel (PCH) and paging indicator (PI) information in the OFDM based evolved UTRA downlink. In the proposed transmission scheme, the PCH and PI information are received through soft-combining from two contiguous sectors within the same node B, to improve the received signal-to-interference...
This paper presents simulation results on the achievable spectrum efficiency, user throughput, and peak data rate in the orthogonal frequency division multiplexing (OFDM) based evolved UTRA (E-UTRA) downlink and single-carrier frequency division multiple access (SC-FDMA) based uplink in order to clarify the link-level performance gain of E-UTRA compared to high-speed downlink packet access (HSDPA)...
This paper is focused on the study of high coding rate irregular low-density parity-check (LDPC) coded Orthogonal Frequency Division Multiplexing (OFDM) Bell Laboratories Layered Space-Time (BLAST) [1] systems for high-speed wireless transmission. One modified LDPC-coded OFDM BLAST scheme is proposed. To generate high coding rate irregular LDPC codes, three construction rules are adopted to obtain...
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