Andrew J. Blanksby

20.2 A 16TX/16RX 60GHz 802.11ad chipset with single coaxial interface and polarization diversity

The IEEE 802.11ad standard supports PHY rates up to 6.7 Gbps on four 2 GHz-wide channels from 57 to 64 GHz. A 60 GHz system offers higher throughput than existing 802.11ac solutions but has several challenges for high-volume production including: integration in the host platform, automated test, and high link loss due to blockage and polarization mismatch. This paper presents a 802.11ad radio chipset capable of SC and OFDM modulation using a 16TX-16RX beamforming RF front-end, complete with an antenna array that supports polarization diversity. To aid low-cost integration in PC platforms, a single coaxial cable interface is used between chips. The chipset is capable of maintaining a link of 4.6 Gbps (PHY rate) at 10 m.

LDPC code set for mmWave communication

A low-density parity-check (LDPC) code set is presented that is specifically designed for multi-gigabit throughput wireless communication in the 60GHz band. The code set is structured to enable low power decoder and encoder implementation while providing excellent coding gain over a wide variety of channels.

Non-binary LDPC codes over finite division near rings

It is almost always assumed that the algebraic structure underlying non-binary Low-Density Parity-Check (LDPC) codes are Finite Fields. However, when considering non-binary LDPC belief-propagation (BP) decoding, Finite Fields are actually over constrained. In this contribution, we discuss the minimal requirements of the algebraic structure used for non-binary LDPC decoding which we denote Finite Division Near Ring over a Subtractive Near Group. To verify the requirements, a general Min-Max decoding algorithm is derived that incorporates any algebraic structure fulfilling this minimal requirement set. It is shown that by relaxing the mathematical constraints, the decoding performance of non-binary LDPC codes can be incrementally improved compared to a Finite-Field-based LDPC code without any additional hardware cost.