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—Multiple-input multiple-output (MIMO) wireless systems increase spectral efficiency by transmitting independent signals on multiple transmit antennas in the same channel band-width. The key to using MIMO is in building a receiver that can decorrelate the spatial signatures on the receiver antenna array. Original MIMO detection schemes such as the vertical(More)
This paper presents the design of a low power spread spectrum correlator. We look at two major approaches and evaluate the best alternative for power reduction. We first consider a shift register FIFO implementation and look at reducing the switching activity for the arithmetic operations with a change in the addition algorithm. The correlation calculation(More)
This silicon device implements a multiple-input multiple-output (MIMO) baseband receiver for the high-speed downlink packet access (HSDPA) extension of the UMTS standard supporting up to 28.8 Mb/s over a 5MHz channel (14.4 Mb/s with rate 1 / 2 coding). MIMO is an approach that maximizes utilization of available spectrum and provides high data rates to users(More)
The rise of food security up international political, societal and academic agendas has led to increasing interest in novel means of improving primary food production and reducing waste. There are however, also many ‘post-farm gate’ activities that are critical to food security, including processing, packaging, distributing, retailing, cooking and(More)
Gating the clock is an important technique used in low power design to disable unused modules of a circuit, Gating can save power by both preventing unnecessary activity in the logic modules as well as by eliminating power dissipa-tion in the clock distribution network.There is an inherent pitfall though in implementing gating groups for hierarchical gated(More)
Design for low power Multiple levels of abstraction: • technology level: dual Vt, • circuit level: complementary static CMOS • logic level: gated clocks • architectural level: datapath, memory optimization • system level: idle modes, variable supply voltage Focus of this presentation: Architectural level TUNE processor components to the application domain(More)
—Foot mounted navigation systems can be deployed for tracking military personnel, first responders and offenders. Determining the activity and environment of individuals can provide valuable information to those monitoring these individuals. This paper provides activity and environment classification for a foot mounted device that uses an IMU and GPS(More)
This paper describes a power, speed and area efficient VLSI implementation of a noise whitening algorithm for a 4x4 MIMO channel. The architecture combines innovative use of Hermitian matrices to streamline the iterative calculations, with a 4x1 matrix row-column multiplier as the core component. The optimisations in the datapath reduce the power and(More)