Coordinate Rotation Digital Computer Algorithm: Design and Architectures

Kumar, Naveen; Sappal, Amandeep Singh

doi:10.14569/ijacsa.2011.020410

Cited by 10 publications

(4 citation statements)

References 7 publications

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“…In Algorithm 1 and Algorithm 2, the major computational complexity comes from Step 2. For each iteration of Step 2, it needs N RF complex multiplications, one real number substraction, and phase operation, which can be realized using coordinate rotation digital computer (CORDIC) algorithm [50].…”

Section: A Analog Precoder and Combiner Optimizationmentioning

confidence: 99%

Energy-Efficient Transceiver Design for Hybrid Sub-Array Architecture MIMO Systems

et al. 2016

IEEE Access

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Millimeter-wave (mmWave) communication operated in frequency bands between 30 and 300 GHz has attracted extensive attention due to the potential ability of offering orders of magnitude greater bandwidths combined with further gains via beamforming and spatial multiplexing from multi-element antenna arrays. MmWave system may exploit the hybrid analog and digital precoding to achieve simultaneously the diversity, array and multiplexing gain with a lower cost of implementation. Motivated by this, in this paper, we investigate the design of hybrid precoder and combiner with sub-connected architecture, where each radio frequency chain is connected to only a subset of base station (BS) antennas from the perspective of energy efficient transmission. The problem of interest is a non-convex and NPhard problem that is difficult to solve directly. In order to address it, we resort to design a two-layer optimization method to solve the problem of interest by exploiting jointly the interference alignment and fractional programming. First, the analog precoder and combiner are optimized via the alternatingdirection optimization method (ADOM) where the phase shifter can be easily adjusted with an analytical structure. Then, we optimize the digital precoder and combiner based on an effective multiple-input January 9, 2017 DRAFT Index TermsMillimeter-wave communication, multiple-input multiple-output (MIMO) system, analog precoding and combining, interference alignment, energy efficiency. I. INTRODUCTIONRecently, data traffic has suffered an exponential growth due to the rapid proliferation of wireless devices, which are creating a spectrum crisis at the current wireless frequency bands. A variety of communication and signal processing techniques are currently being pursued for improvement of wireless rate and efficient use of the available spectrum, such as multiple-input multiple-output (MIMO) technolo-. Despite these efforts, meeting the dramatically increasing data demands of wireless devices and applications is still a tremendous challenge for sub-6 Gigabit Hertz wireless communications [7].Millimeter Wave (mmWave) wireless communication systems, operating in the frequency bands from 30 − 300 GHz, are emerging as a promising technology for the exploding bandwidth requirements by enabling multi-Gpbs speeds [8]- [12]. Recently, the advance in mmWave hardware has encouraged studying and applying mmWave for outdoor cellular networks and short distance communication. However, the shortcoming is that mmWave signal may experience an order of magnitude increase in free-space path-loss due to the ten-fold increase in carrier frequency compared to sub-6 GHz frequency bands.Fortunately, the decrease in wavelength leads to a dramatic increase of the number of antenna elements within a given antenna size such that large arrays can provide narrow and high-gain beams to overcome the path-loss [13]- [20]. Furthermore, large arrays may significantly improve the spectrum efficiency by transmitting simultaneously multiple data streams [21]- [25...

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Section: A Analog Precoder and Combiner Optimizationmentioning

confidence: 99%

Energy-Efficient Transceiver Design for Hybrid Sub-Array Architecture MIMO Systems

et al. 2016

IEEE Access

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“…The BMA 180 was used to compute the tilt angle using the CORDIC algorithm (COrdinate Rotation DIgital Computer) and the inverse tangent function [22], [23]. Two basic CORDIC modes are used to compute different functions: the rotation mode and the vectoring mode [19].…”

Section: B Tilt Measurementmentioning

confidence: 99%

Field Programmable Gate Array (FPGA) Respiratory Monitoring System Using a Flow Microsensor and an Accelerometer

Mellal

Laghrouche

Bui

2017

Measurement Science Review

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This paper describes a non-invasive system for respiratory monitoring using a Micro Electro Mechanical Systems (MEMS) flow sensor and an IMU (Inertial Measurement Unit) accelerometer. The designed system is intended to be wearable and used in a hospital or at home to assist people with respiratory disorders. To ensure the accuracy of our system, we proposed a calibration method based on ANN (Artificial Neural Network) to compensate the temperature drift of the silicon flow sensor. The sigmoid activation functions used in the ANN model were computed with the CORDIC (COordinate Rotation DIgital Computer) algorithm. This algorithm was also used to estimate the tilt angle in body position. The design was implemented on reconfigurable platform FPGA.

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“…The initial values fed into register by multiplexer where Most Significant Bit (MSB) of stored value in z-input, which determines the operation mode for adder/subtractor. Signals x and y inputs pass shift units and added/subtracted from unshifted signal in the opposite path [5]. The z input arithmetically combines registers values with values taken from a LookUp Table(LUT) whose address changed according to number of iteration.…”

Section: Bit Parallel-iterative Cordicmentioning

confidence: 99%

Bit parallel - iterative circuit for robotic application

Velrajkumar

Senthilpari

Ramanamurthy

et al. 2012

IEICE Electron. Express

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Abstract:The real time anticipation of robotic task is important in finding and correcting the error in CPU of robot, which may designed using by bit parallel-iterative CORDIC circuit. This paper proposed pass transistor logic based multiplexer, register, full adder and basic logic gates that are implemented into bit parallel-iterative CORDIC basic circuits. The circuits are designed using by DSCH2 CAD tool and layout are generated by microwind 3 CAD tool. The parameter analysis done by BSIM4 analyzer. The CPL CORDIC circuit is compared with conventional and CMOS CORDIC circuits that give better performance in terms of speed, power consumption and area. The analyses are extended to Fast Fourier Transformation (FFT). Keywords: robot, bit parallel-iterative, CORDIC algorithm, FFT, PTL Classification: Electron devices, circuits, and systems References[1] C. C. Sun and J. Götze, "A VLSI design concept for parallel iterative algorithms," Adv.

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Coordinate Rotation Digital Computer Algorithm: Design and Architectures

Cited by 10 publications

References 7 publications

Energy-Efficient Transceiver Design for Hybrid Sub-Array Architecture MIMO Systems

Energy-Efficient Transceiver Design for Hybrid Sub-Array Architecture MIMO Systems

Field Programmable Gate Array (FPGA) Respiratory Monitoring System Using a Flow Microsensor and an Accelerometer

Bit parallel - iterative circuit for robotic application

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