Cognitive radios for dynamic spectrum access - polyphase multipath radio circuits for dynamic spectrum access

Dynamic access of unused spectrum via a cognitive radio asks for flexible radio circuits that can work at an arbitrary radio frequency. This article reviews techniques to realize radios without resorting to frequency selective dedicated filters. In particular, a recently proposed polyphase multipath technique canceling harmonics and sidebands is discussed. Using this technique, a wideband and flexible power upconverter with a clean output spectrum has been realized on a CMOS chip, aiming at flexible radio transmitter application. Prototype chips can transmit at an arbitrary frequency between DC and 2.4 GHz. Unwanted harmonics and sidebands are more than 40 dB lower than the desired signal up to the 17th harmonic of the transmit frequency

[1]  Eric A. M. Klumperink,et al.  Jitter requirements of the sampling clock in software radio receivers , 2006, IEEE Transactions on Circuits and Systems II: Express Briefs.

[2]  Michael J. Marcus,et al.  Unlicensed cognitive sharing of TV spectrum: the controversy at the Federal Communications Commission , 2005, IEEE Communications Magazine.

[3]  B. Nauta,et al.  Wide-band CMOS low-noise amplifier exploiting thermal noise canceling , 2004, IEEE Journal of Solid-State Circuits.

[4]  M. Heskamp,et al.  A node architecture for disaster relief networking , 2005, First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005..

[5]  Robert H. Walden,et al.  Performance trends for analog to digital converters , 1999, IEEE Commun. Mag..

[6]  Willy Sansen,et al.  Distortion in elementary transistor circuits , 1999 .

[7]  Eisse Mensink,et al.  A multipath technique for canceling harmonics and sidebands in a wideband power upconverter , 2006, 2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers.

[8]  H. Yamaguchi,et al.  Active interference cancellation technique for MB-OFDM cognitive radio , 2004, 34th European Microwave Conference, 2004..

[9]  Ahmad Mirzaei,et al.  Software-defined radio receiver: dream to reality , 2006, IEEE Communications Magazine.

[10]  Li Lin,et al.  A 1.75 GHz highly-integrated narrow-band CMOS transmitter with harmonic-rejection mixers , 2001, 2001 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. ISSCC (Cat. No.01CH37177).

[11]  Khurram Muhammad,et al.  Digital RF processing: toward low-cost reconfigurable radios , 2005, IEEE Communications Magazine.

[12]  P. B. Kenington.  Linearized transmitters: an enabling technology for software defined radio , 2002 .

[13]  B. Nauta,et al.  A CMOS switched transconductor mixer , 2004, IEEE Journal of Solid-State Circuits.

[14]  Eisse Mensink,et al.  Distortion cancellation by polyphase multipath circuits , 2005, IEEE Trans. Circuits Syst. I Regul. Pap..

[15]  Friedrich Jondral,et al.  Spectrum pooling: an innovative strategy for the enhancement of spectrum efficiency , 2004, IEEE Communications Magazine.