Qualcomm Incorporated

Se Yong Park

Alexandros Manolakos

Joseph Binamira Soriaga

Krishna Kiran Mukkavilli

Jing Jiang

Thomas J Richardson

Shrinivas Kudekar

Vincent Loncke

Peter S Gaal

Tingfang Ji

Sony Akkarakaran

Hao Xu

Wei Zeng

Yi Huang

Yu Zhang

Renqiu Wang

Certain aspects of the present disclosure generally relate to techniques for puncturing of structured low density parity check (LDPC) codes. A method for wireless communications by wireless node is provided. The method generally includes encoding a set of information bits based on a LDPC code to produce a code word, the LDPC code defined by a matrix having a first number of variable nodes and a second number of check nodes, puncturing the code word to produce a punctured code word, wherein the puncturing is performed according to a first puncturing pattern designed to puncture bits corresponding to one or more of the variable nodes having a certain degree of connectivity to the check nodes, and transmitting the punctured code word.

Puncturing for structured low density parity check (LDPC) codes

Methods, systems, and devices for wireless communication are described that support a low peak-to-average power ratio (PAPR) precoded reference signal design for multiple-input, multiple-output (MIMO) transmissions. A user equipment (UE) may identify multiple sets of symbols associated with different reference signal waveforms, where each reference signal waveform may be associated with a low PAPR. In some cases, different single-carrier reference signal waveforms may be mapped to subsets of frequency resources through frequency division multiplexing (FDM) for a transmission on a single antenna. However, the addition of single-carrier waveforms through FDM for a transmission via an antenna may result in an uplink transmission having a high PAPR (e.g., as compared to single-carrier waveforms). The UE may reduce the PAPR of the uplink transmission by multiplexing the reference signal waveforms in the time domain (e.g., using time division multiplexing (TDM)).

Low peak-to-average power ratio precoded reference signal design for multiple-input, multiple-output transmissions

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Se Yong Park