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A 60GHz 4×4 circular polarized (CP) patch array antenna with a 90nm CMOS OOK modulator are integrated in low temperature co-fired ceramic (LTCC) substrate to form a SiP transmitter. The CP array shows a 3dB axial ratio (AR) bandwidth of over 8GHz. It has a 3dB beamwidth of 20º and a peak gain of 16.8dBi. Device modeling at 60GHz is done to accurately simulate the lumped components. The CMOS modulator...
A low complexity M-algorithm based multiple-input multiple-output (MIMO) tree search algorithm with near maximum likelihood (ML) performance is proposed in this paper. Numerical examples show that our tree search algorithm is able to provide a significant performance gain over the MMSE detection. Based on this algorithm, a fully pipelined architecture is presented for the MIMO orthogonal frequency...
A 60 GHz 4 × 4 circular polarized (CP) patch array antenna with a 90 nm CMOS OOK modulator are designed and integrated in low temperature cofired ceramic (LTCC) substrate to form a SiP-based transmitter. By applying a stripline sequential rotation feeding scheme, the CP array exhibits a wide impedance bandwidth (VSWR<;2) and 3 dB axial ratio (AR) bandwidth, both over 8 GHz. It has a beam-shaped...
Although recent advances in neuroscience, information technology and microelectronics have enabled implanting miniature and highly intelligent devices within the brain for in vitro diagnostic and therapeutic functions, novel signal processing methods are required for energy efficient data acquisition due to power constraints accompanying these miniature devices. We present a new method for signal...
Brain-computer interfaces (BCIs) provide a way to monitor and treat neurological diseases. An important application of BCIs is the monitoring and treatment of epilepsy, a neurological disorder characterized by recurrent unprovoked seizures, symptomatic of abnormal, excessive or synchronous neuronal activity in the brain. BCIs contain an array of sensors that gather and transmit data under the constrains...
An approach for secure communication using chaotic systems is proposed, where the information signal to be transmitted is over a finite time interval. A parameter of the chaotic system is modulated by the information signal, and the mechanism for generating the transmitting signal is a pre-specified nonlinear function. Iterative learning identification is applied to recovery the masked signal, which...
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