A QPSK direct-conversion receiver for wireless communications

Karmakar, Nemai Chandra

doi:10.1002/mmce.20049

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…In summary, ultra-wideband coverage has become more critical, and ultra-wideband receiving systems have a broader application prospect. At present, the commonly used technical solutions for receiver systems are rough as follows: superheterodyne architecture, [8][9][10][11][12][13][14] zerointermediate frequency (IF) architecture, [15][16] and low-IF architecture. [17][18] The design of this article uses the superheterodyne architecture as the final technical solution.…”

Section: Introductionmentioning

confidence: 99%

A tunable ultra‐wideband superheterodyne radio frequency receiver with high‐image‐rejection levels

Wang

et al. 2022

Int J RF Mic Comp-Aid Eng

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This article presents the superheterodyne radio frequency (RF) receiver composed of two receiving channels, which can realize an ultra-wide receiving frequency band. The RF signal can be received and demodulated in a variable frequency band by controlling the voltage of RF switches, which makes the RF signal enter the appropriate frequency conversion channel and tuning the local oscillator frequency according to the RF signal frequency. Therefore, the receiver realizes the adjustable working frequency band and an ultra-wide receiving frequency band. The designed superheterodyne RF receiver is simulated, manufactured, and measured. Finally, the article achieves a tunable ultra-wideband superheterodyne RF receiver with an image-rejection architecture that can provide rejection of more than 29.0 dB. The receiving frequency band of the receiver is 2.5 GHz -12 GHz. When the proposed receiver link receives multiple types of quadrature signals with a symbol rate of 50 M Baud, the error vector magnitude is less than 1.90%.

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Section: Introductionmentioning

confidence: 99%

A tunable ultra‐wideband superheterodyne radio frequency receiver with high‐image‐rejection levels

Wang

et al. 2022

Int J RF Mic Comp-Aid Eng

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“…Nowadays, wireless communication systems are developing in the direction of multi‐frequency, broadband, high integrated, and intelligent. There are three mainstream architectures for the implementation of wireless communication transceiver systems: super‐heterodyne transceiver architecture, 5‐6 low‐intermediate frequency (low‐IF) transceiver architecture, 7‐10 and zero intermediate frequency (zero‐IF) transceiver architecture 11‐24 . Super‐heterodyne architectures have large receiving dynamic range, high‐adjacent channel selectivity, and high‐receiving sensitivity.…”

Section: Introductionmentioning

confidence: 99%

A zero intermediate frequencyRFtransceiver with tunable operating frequency band

Bai

Wang

et al. 2021

Int J RF Microw Comput Aided Eng

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A zero intermediate frequency (zero‐IF) radio frequency (RF) transceiver with tunable operating frequency band is proposed in this article, which consists of a transmitter (Tx), a receiver (Rx). Both the Tx and the Rx can achieve broadband operation. By tuning the carrier signal frequency (fc), the Tx and Rx can work in variable frequency band which is determined by fc. Therefore, a transceiver with tunable operating frequency band was realized. A prototype of the designed transceiver was designed, simulated, manufactured, and measured. In the end, a zero‐IF RF transceiver with tunable frequency band during 2.3 to 3.5 GHz was implemented. The gain range of the Tx is −35 to 28 dB. The gain range of the Rx is 28 to 78 dB. For 16‐QAM signal with a symbol rate of 15 MHz, the error vector magnitude of proposed Tx and Rx are less than 7.8% and 5.0%, respectively.

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Coaxial Lines And Waveguides

Karmakar

Padhi

2005

Encyclopedia of RF and Microwave Engineering

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In this article we first describe the classical theory in which transmission lines are assumed to be a distributed section of series resistance and inductance, as well as shunt capacitance and conductance. This model is then evolved into the telegrapher equation, which explains the wave nature of electromagnetic energy guided by a two‐conductor transmission line. Finally, the field theory of transmission lines is used to derive coaxial transmission‐line theory.

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A QPSK direct-conversion receiver for wireless communications

Cited by 5 publications

References 3 publications

A tunable ultra‐wideband superheterodyne radio frequency receiver with high‐image‐rejection levels

A tunable ultra‐wideband superheterodyne radio frequency receiver with high‐image‐rejection levels

A zero intermediate frequencyRFtransceiver with tunable operating frequency band

Coaxial Lines And Waveguides

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