Phase noise reduction techniques for multigigabit per second OFDM systems operating at 60 GHz

The IEEE 802.15.3C standards committee is working towards developing a standard that operates in the 57-64 GHz range and delivers data rates in the many gigabits per second range for devices communicating over a few meters. Multi carrier modulation schemes like orthogonal frequency division multiplexing (OFDM) and single carrier schemes like single carrier block transmission (SCBT) are being considered. It has been reported that OFDM systems are susceptible to poor performance in high phase noise environments. Unfortunately because implementations of millimetre-wave systems on current CMOS processes require active devices to operate at a significant fraction of the device transit frequency, high levels of phase noise are produced. In this paper we describe a modification to the long training preamble and new algorithms to mitigate the effects of phase noise for 802.15.3c OFDM systems built on CMOS operating at millimetre wavelengths.