TR2015-043

Inter-Band Carrier Aggregation Digital Transmitter Architecture with Concurrent Multi-Band Delta-Sigma Modulation Using Out-of-Band Noise Cancellation


    •  Chung, S.; Ma, R., "Inter-Band Carrier Aggregation Digital Transmitter Architecture with Concurrent Multi-Band Delta-Sigma Modulation Using Out-of-Band Noise Cancellation", IEEE MTT-S International Microwave Symposium, DOI: 10.1109/MWSYM.2015.7166934, ISSN: 0149-645X, May 2015, pp. 1-4.
      BibTeX Download PDF
      • @inproceedings{Chung2015may,
      • author = {Chung, S. and Ma, R.},
      • title = {Inter-Band Carrier Aggregation Digital Transmitter Architecture with Concurrent Multi-Band Delta-Sigma Modulation Using Out-of-Band Noise Cancellation},
      • booktitle = {IEEE MTT-S International Microwave Symposium},
      • year = 2015,
      • pages = {1--4},
      • month = may,
      • doi = {10.1109/MWSYM.2015.7166934},
      • issn = {0149-645X},
      • url = {http://www.merl.com/publications/TR2015-043}
      • }
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  • Research Areas:

    Electronics & Communications, RF


Concurrent multi-band delta-sigma modulation (CMB-DSM) with out-of-band noise cancellation is presented for the first time. A scaled replica modulator creates anti-phased quantization noise for multi-band noise cancellation, consequently reducing adjacent channel leakage and significantly relaxing the design of a multi-band RF filter to suppress undesirable out-of-band emission. A prototype digital transmitter is designed with 6th-order CMB-DSM using a loop filter with stability compensation. Experimental results show that the proposed noise cancellation technique achieves more than 15- dB suppression on the out-of-band quantization noise with LTE inter-band carrier aggregation (CA) on 856 MHz and 1450 MHz bands with 40-MHz aggregated channel bandwidth.