Relay-aided non-orthogonal multiple access with noisy network coding

We consider two-user relay-aided uplink nonorthogonal multiple access (NOMA) with noisy network coding (NNC) at the relay. The NNC-based cooperation strategy at the relay relies on noisy quantization followed by joint source-channel coding, while at the destination it utilizes joint decoding using the non-orthogonal signals received from the sources and the relay. After presenting the information theoretic achievable rates for the NNC-based cooperation scheme, we discuss how it outperforms conventional compress-and-forward (CF) cooperation even when the relay has access to global channel state information (CSI). For the NNC-based approach, we also derive closed-form expressions for probability of outage when the relay has access to local CSI, as well as when the relay has knowledge of the receive CSI only. These closed-form expressions help in appropriately choosing the quantizer so as to optimize the outage performance. Simulation indicate that NNC-based relaying outperforms CF by 2.2 dB when global CSI is available at the relay. Additionally, the availability of global CSI results in an improvement of 3.8 dB and 5.4 dB over the case when relay has access only to local CSI and the receive CSI, respectively.

[1]  H. Vincent Poor,et al.  Cooperative Non-Orthogonal Multiple Access in 5G Systems , 2015, IEEE Communications Letters.

[2]  Yang Liu,et al.  Hybrid Decode-Forward & Amplify-Forward Relaying With Non-Orthogonal Multiple Access , 2016, IEEE Access.

[3]  Kewu Peng,et al.  A suboptimal scheme for uplink NOMA in 5G systems , 2015, 2015 International Wireless Communications and Mobile Computing Conference (IWCMC).

[4]  Youngchul Sung,et al.  Improving Non-Orthogonal Multiple Access by Forming Relaying Broadcast Channels , 2015, IEEE Communications Letters.

[5]  Gerhard Kramer,et al.  Short Message Noisy Network Coding With a Decode–Forward Option , 2013, IEEE Transactions on Information Theory.

[6]  Christina Fragouli,et al.  Optimizing quantize-map-and-forward in slow fading relay networks , 2012, 2012 50th Annual Allerton Conference on Communication, Control, and Computing (Allerton).

[7]  Holger Claussen,et al.  Personal, Indoor and Mobile Radio Communications (PIMRC) , 2003 .

[8]  A.J. van Wijngaarden,et al.  On the white Gaussian multiple-access relay channel , 2000, 2000 IEEE International Symposium on Information Theory (Cat. No.00CH37060).

[9]  Raphaël Visoz,et al.  Near outage limit joint network coding and decoding for the Non-Orthogonal Multiple-Access Relay Channel , 2012, 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC).

[10]  H. Vincent Poor,et al.  Cooperative Non-orthogonal Multiple Access With Simultaneous Wireless Information and Power Transfer , 2015, IEEE Journal on Selected Areas in Communications.

[11]  In-Ho Lee,et al.  Capacity Analysis of Cooperative Relaying Systems Using Non-Orthogonal Multiple Access , 2015, IEEE Communications Letters.

[12]  Sae-Young Chung,et al.  Noisy network coding , 2010 .

[13]  Suhas N. Diggavi,et al.  Wireless Network Information Flow: A Deterministic Approach , 2009, IEEE Transactions on Information Theory.

[14]  Zhiguo Ding,et al.  Nonorthogonal Multiple Access for 5G , 2018, 5G Networks: Fundamental Requirements, Enabling Technologies, and Operations Management.

[15]  Raphaël Visoz,et al.  Outage analysis of various cooperative strategies for the Multiple Access Multiple Relay Channel , 2013, 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC).