A Two-Stage Approach to Harmonic Rejection Mixing Using Blind Interference Cancellation

Moseley, N.A.; Klumperink, Eric A.M.; Nauta, Bram

doi:10.1109/tcsii.2008.926796

Cited by 22 publications

(15 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This figure is limited by mismatches within the analog circuits. To further enhance the harmonic image suppression of the analog frontend, we have proposed a digital compensator based on blind adaptive signal processing which increases the suppression of the strongest harmonic image [5], typically by 40 dB.…”

Section: A Quadrature Downconversionmentioning

confidence: 99%

See 1 more Smart Citation

A Spectrum Sensing Technique for Cognitive Radios in the Presence of Harmonic Images

Moseley

Klumperink

Nauta

2008

2008 3rd IEEE Symposium on New Frontiers in Dynamic Spectrum Access Networks

Self Cite

View full text Add to dashboard Cite

Abstract-Harmonic downmixing is an important effect that must be taken into account when performing sensitive spectrum sensing using direct-conversion receivers. When the local oscillator waveform contains harmonics of the fundamental frequency, the quadrature mixer in the receiver will downconvert RF signals found at these harmonics, termed harmonic images, in addition to the RF signals around the fundamental frequency. The harmonic images will be detected by power spectral density based sensing algorithms and will cause certain parts of the desired spectrum to be mistakenly flagged as occupied. Although harmonic downmixing is important to consider, it is an often negelected effect. This paper presents a harmonic rejection spectral sensing technique, that exploits two quadrature mixers. The mixers work with different LO frequencies, which decorrelate the harmonic images so that cross-correlation of their outputs renders an improved spectral estimate. In addition to rejecting the harmonic images, spurious signals entering the receiver through the analog baseband inputs will also be rejected. The frequency resolution of the spectral estimate is scalable and the rejection of the harmonic images increases 15 dB per 1000-fold increase of the correlation time. The complexity of the algorithm is analyzed and its performance is shown by means of simulations. The effect of I/Q imbalance is also taken into account.

show abstract

Section: A Quadrature Downconversionmentioning

confidence: 99%

“…The correlation (24) will provide information on the power of that harmonic image. Such information is useful in adaptive harmonic rejection schemes, such as [5].…”

Section: B Cross-correlation Based Signal Detectionmentioning

confidence: 99%

A Spectrum Sensing Technique for Cognitive Radios in the Presence of Harmonic Images

Moseley

Klumperink

Nauta

2008

2008 3rd IEEE Symposium on New Frontiers in Dynamic Spectrum Access Networks

Self Cite

View full text Add to dashboard Cite

show abstract

“…To investigate the impact of bandwidth on the harmonic rejection ratio, a simple rectangular low-pass model is used as an approximation to ease the analysis. For this purpose, (10), (11) and (12) are rewritten as (13), (14) and (15) rejection ratio can be achieved if the bandwidth reaches 16 times the LO frequency.…”

Section: (4)mentioning

confidence: 99%

“…Calibration methods can be used to cope with the mismatch problems, but would cause a remarkable increase of circuit complexity and power dissipation. In reference [11], a mixed analog-digital approach was used, which help achieve an improved harmonic rejection ratio, but raises the circuitry complexity.…”

Section: Introductionmentioning

confidence: 99%

A CMOS Switched Load Harmonic Rejection Mixer for DTV Tuner Applications

Chen¹,

Wu²,

Huang³

et al. 2013

IEEE Trans. Circuits Syst. I

View full text Add to dashboard Cite

In this paper, a switched load harmonic rejection mixer (HRM) structure with one single mixer core and a pair of switched load resistors is proposed. Different from the traditional three-phase HRM which is widely used in DTV tuners, this HRM performs the harmonic rejection function by vector multiplication rather than superposition. Sharing most of its parts with an ordinary Gilbert mixer, the proposed HRM shows greater simplicity in structure. The single mixer-core structure is also more power efficient than a traditional three-phase HRM. In order to verify the effectiveness of this approach, a proof-of-concept prototype is designed and fabricated in 0.18-m RFCMOS technology. Measurements indicate that 38 dB for 3rd and 34.5 dB for 5th harmonic rejection ratio can be achieved. The HRM including a buffer stage consumes a low bias current of 3 mA under 1.8 V supply voltage and has equivalent performance such as CG, NF, and IIP3 to an ordinary Gilbert mixer. With the load switch inactivated, this HRM can be easily transformed into an ordinary Gilbert mixer, which increases its flexibility for different applications.

show abstract

“…To guarantee more than 60 dB HR ratio, state-of-the-art wideband TV tuners employ linearization techniques [12], iterative rejection techniques using two-stage polyphase HR and digital adaptive interference cancellation concepts [13], [14]. All these techniques need extra circuitry.…”

Section: Harmonic Rejection Specificationmentioning

confidence: 99%

A 60 dB Harmonic Rejection Mixer for Digital Terrestrial TV Tuner

Bouhamame¹,

Coco²,

Amiot³

et al. 2012

IEEE Trans. Circuits Syst. I

View full text Add to dashboard Cite

A harmonic rejection mixer has been designed for DVB-T reception in VHFIII frequency band. It exhibits 21.3 dB noise figure, 29 dBm input IP3, and 67 dBm input IP2 over the 48-300 MHz frequency range. The third and fifth harmonics are suppressed by more than 60 dB thanks to phase error calibration.The 0.39 mm 2 active die is fabricated in 40-GHz Bi-CMOS process consuming 38 mA from a 3.3 V supply including the LO chain.

show abstract

A Two-Stage Approach to Harmonic Rejection Mixing Using Blind Interference Cancellation

Cited by 22 publications

References 11 publications

A Spectrum Sensing Technique for Cognitive Radios in the Presence of Harmonic Images

A Spectrum Sensing Technique for Cognitive Radios in the Presence of Harmonic Images

A CMOS Switched Load Harmonic Rejection Mixer for DTV Tuner Applications

A 60 dB Harmonic Rejection Mixer for Digital Terrestrial TV Tuner

Contact Info

Product

Resources

About