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In this issue of Integrated Circuits for Communications, we have selected two articles that mark recent progress in the communications semiconductor industry which is enabling digital implementation of communication systems on chip (SoCs). Prior to the late 1980s, communications circuits were mainly analog, and so were the corresponding systems that used them. These systems include the National Television...
We have realized a 200GHz 4×4 focal plane array (FPA) by using super-regenerative receiver (SRR) pixels made of 65nm CMOS for mm-wave imaging applications. With 16 pixel elements constructed on PCB, the FPA consumes 215mA under 1V power supply. Such realization is made possible by carefully analyzing the super-regenerative interference (SRI) commonly observed in close-spaced SRRs and applying a newly...
This paper presents a mm-wave imaging CMOS regenerative receiver which is intermodulated by a second oscillator to provide multiple receive bands at 349, 201 and 53 GHz for false color imaging. The proposed receiver consumes 18.2mW per pixel and occupies 0.021mm2 of silicon area.
In this paper, we study in-vehicle digital network systems. We propose a switch-based architecture for in-vehicle networks and focus on the critical related issue: routing schemes. We note that in-vehicle networks are fundamentally different from many other switch-based networks (e.g., the Internet). This is because within an in-vehicle network, messages are not unicast or multicast as in the Internet,...
We present the design and test results for D-band CMOS transmitter (Tx) and receiver (Rx) for ultra-high speed and short distance data communications. The Tx/Rx employs modulation/de-modulation based on Amplitude-Shift Keying (ASK) to facilitate a non-coherent data link without power-hungry PLL, data converters, and complex DSP. The Tx consists of a wideband 131~140GHz VCO along with an On/Off key...
In this paper, we propose and analyze a new GPS positioning algorithm. Our algorithm uses the direct linearization technique to reduce the computation time overhead. We invoke the general least squares method in order to achieve optimality in the situation when the trilateration system of equations becomes over-determined. We systematically evaluate our new algorithms and show that they indeed take...
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