Detectors, bandpass nonlinearities, and their optimization: Inversion of the Chebyshev transform

Blachman, Nelson M.

doi:10.1109/tit.1971.1054647

Cited by 98 publications

(34 citation statements)

References 3 publications

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“…When the input to the amplifier is a sine wave of constant amplitude A, the amplifier output contains the fundamental zone and various harmonic zones. The fundamental zone output is just a sine wave of amplitude g(A), which is given by the Chebyshev transform [16] of F(u), and for the specific case of (19) is given by…”

Section: Figure 12 Soft Limiter Input Output Characteristicsmentioning

confidence: 99%

An Analysis of the Distortion Effects of Nonlinear Amplifiers on CDMA Signals

Kumar¹

2007

2007 IEEE Aerospace Conference

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This paper 1,2 presents a direct method of analyzing the distortion effects of the power amplifier nonlinearity on the CDMA signal. In the analysis approach of the paper, the various user signals, which are composed of data-modulated Walsh codes, which are also modulated by various scrambling codes, are modeled as independent random sequences. These sequences are band limited, using square root raised cosine filters and modulated by a carrier frequency before being input to the nonlinear power amplifier. The paper derives a closed-form expression for the output signal power, the output signal power-todistortion power spectral density ratio as a function of the input signal power back-off, the number of codes, and the amplifier transfer characteristics. The paper also shows that the amplifier possesses a maximum capacity defined as the maximum total bit rate R T that can be present at the amplifier input for a specified output signal power back-off and the required output bit energy to distortion power spectral density ratio (E b /N 0d ). Alternatively at any given output back-off and user data rate, the (E b /N 0d ) ratio is a strong function of the number of codes M in the CDMA signal.

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Section: Figure 12 Soft Limiter Input Output Characteristicsmentioning

confidence: 99%

An Analysis of the Distortion Effects of Nonlinear Amplifiers on CDMA Signals

Kumar¹

2007

2007 IEEE Aerospace Conference

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“…Usually this methods are fast and independent of the dynamic of the unwanted signal. The first application was the so called bandpass-limiter investigated by Davenport, Cahn and Blachman [15], [14], [38], [9], [10], [11], [50], [12], [37] and dates back to 1961. The bandpasslimiter was used for bandpass signals and is located in the input section of the receiver.…”

Section: Contribution To Literaturementioning

confidence: 99%

Low-Complex Reliable Communications between Wireless Network-Nodes

Goiser¹

2015

Proceedings of the 1st International Conference on Industrial Networks and Intelligent Systems

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Abstract-We present a low-complex blind interference reduction scheme embedded in the receiver to enhance correlative data detection. The key element is a statistically controlled adaptive nonlinearity prior to correlation. This add-on feature guaranties reliable communication between network-nodes in any type of noise and/or interference. Additionally the concept provides accurate position measurements to make services flexible and intelligent.

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“…For an input signal of V P K · cos ω 0 t, the Blachman transformation [20] can be employed to transform (7) into a summation of current components given by:…”

Section: Mathematical Analysis Of the Linearizermentioning

confidence: 99%

A Flexible Dual-Inflection Point Rf Predistortion Linearizer for Microwave Power Amplifiers

Hashmi¹,

Rogojan²,

Ghannouchi³

2010

PIER C

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Abstract-This paper presents a very flexible and generic design of a diode-based RF predistortion linearizer that can correct for the dualinflection point type compression characteristics found in the gain profile of metal semiconductor field effect transistor (MESFET) based and Doherty power amplifiers. It consists of a circuit configuration that has the head-tail configuration of Schottky diodes, complemented with a p-intrinsic-n (PIN) diode in parallel, at two ports of a 90 • hybrid coupler for improving the performance of the linearizer. The use of a PIN diode in the linearizer provides it with an extra level of freedom in achieving the desired characteristic. Overall, the linearizer is equipped with three degrees of freedom and hence possesses the capability to achieve output characteristics that can be employed in linearizing various types of power amplifiers. The proposed linearizer has been shown to simultaneously improve the third-and fifthorder intermodulation distortions of a commercial ZHL-4240 gallium arsenide field effect transistor (GaAs FET) based power amplifier over a 10 dB power range.

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Detectors, bandpass nonlinearities, and their optimization: Inversion of the Chebyshev transform

Cited by 98 publications

References 3 publications

An Analysis of the Distortion Effects of Nonlinear Amplifiers on CDMA Signals

An Analysis of the Distortion Effects of Nonlinear Amplifiers on CDMA Signals

Low-Complex Reliable Communications between Wireless Network-Nodes

A Flexible Dual-Inflection Point Rf Predistortion Linearizer for Microwave Power Amplifiers

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