Proposed Title :

Low complexity analog technique for attenuation of LO harmonic Suppression Technique for SDR Receivers

Improvement of this Project:

• • To develop a Low pass filter design using Truncation multiplier concept.

  • To implement this Filter design with a SDR in high-Q RF filtering resilient to out-of-band blockers for a low complexity analog technique for attenuation of LO harmonics.

Software implementation:

• Modelsim & Xilinx

Proposed System:

Software Defined radios (SDRs) are reconfigurable systems that are able to tune to any wireless standard with variable carrier frequency, modulation type, and bandwidth.  This concept is inspired by the increased demand for integrated multi standard wireless transceivers.  This paper proposes the SDR front end with high-Q RF filtering resilient to out-of-band blockers and low complexity analog technique for attenuation of LO harmonics. The transconductance can be modulated by the (LNTA) low-noise transconductance amplifier with a raised-cosine signal.  Thus, the effective attenuation of the LO harmonics is achieved. Removing any RF pre filtering causes several problems includes wideband noise and large blockers that can directly leak into the receiver.  Therefore, the proposed system presents the SDR receivers for low complexity analog technique for attenuation of LO harmonics.  This achieves a better performance of SDR receivers.  Finally, this technique is implemented in the VHDL and synthesized in the XILINX and shown the comparison in terms of area, power and delay comparison.

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An Analog LO Harmonic Suppression Technique for SDR Receivers

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