Abstract Self-Interference Cancellation Techniques for SAW-less Transceivers Saheed A. TIJANI The adoption of mobile wireless communication technologies ranging from GSM to the future 5G radios has continuously required increased data rates and quality of service and, in general, the miniaturization of devices and costs reduction. At this contemporary world, one cannot imagine life without wireless communications. Practically, our mobile smartphones have become our daily companion which are used for different tasks ranging from writing emails, making both voice and video calls, live program streaming, IOT (internet of things) applications, and endless tasks we could not imagine in the past. The present wireless radios have inevitably off-chip passive components like the SAW filters, Duplexer and high Q filters. These filters are needed to filter out unwanted signals such as large CW (continuous wave) blockers and self-interference signals (or TX leakage) by about 50dB. The fact that recent mobile wireless technologies like LTE and the future 5G propose the adoption of MIMO and carrier aggregation capable of managing multi bands in the system architecture, it implies that the number of antennas, external fixed frequency filters and on-chip building blocks would increase further. Hence, a huge increase in the form factor and cost will result unless some actions are taken. This thesis proposes two innovative self-interference cancellation(SIC) techniques for transceivers while eliminating the use of external SAW filters/ Duplexers. This dissertation compares active and passive SIC techniques where the passive SIC technique has been fully integrated. The concepts, analysis and results are presented. These approaches specifically suppress self-interference while improving the linearity of the receiver with the benefit of low form factor, reduced cost and relaxed linearity requirements for the front-end building blocks. In the concluding part of the thesis, a control loop algorithm is proposed to optimize IIP2 of LNA (in a duplexer/SAW-less receiver suitable for TV white space applications) during process corners and temperature variations.

Abstract Self-Interference Cancellation Techniques for SAW-less Transceivers Saheed A. TIJANI The adoption of mobile wireless communication technologies ranging from GSM to the future 5G radios has continuously required increased data rates and quality of service and, in general, the miniaturization of devices and costs reduction. At this contemporary world, one cannot imagine life without wireless communications. Practically, our mobile smartphones have become our daily companion which are used for different tasks ranging from writing emails, making both voice and video calls, live program streaming, IOT (internet of things) applications, and endless tasks we could not imagine in the past. The present wireless radios have inevitably off-chip passive components like the SAW filters, Duplexer and high Q filters. These filters are needed to filter out unwanted signals such as large CW (continuous wave) blockers and self-interference signals (or TX leakage) by about 50dB. The fact that recent mobile wireless technologies like LTE and the future 5G propose the adoption of MIMO and carrier aggregation capable of managing multi bands in the system architecture, it implies that the number of antennas, external fixed frequency filters and on-chip building blocks would increase further. Hence, a huge increase in the form factor and cost will result unless some actions are taken. This thesis proposes two innovative self-interference cancellation(SIC) techniques for transceivers while eliminating the use of external SAW filters/ Duplexers. This dissertation compares active and passive SIC techniques where the passive SIC technique has been fully integrated. The concepts, analysis and results are presented. These approaches specifically suppress self-interference while improving the linearity of the receiver with the benefit of low form factor, reduced cost and relaxed linearity requirements for the front-end building blocks. In the concluding part of the thesis, a control loop algorithm is proposed to optimize IIP2 of LNA (in a duplexer/SAW-less receiver suitable for TV white space applications) during process corners and temperature variations.

Self-Interference Cancellation Techniques for SAW-less Transceivers

TIJANI, SAHEED ADEOLU
2018-03-02

Abstract

Abstract Self-Interference Cancellation Techniques for SAW-less Transceivers Saheed A. TIJANI The adoption of mobile wireless communication technologies ranging from GSM to the future 5G radios has continuously required increased data rates and quality of service and, in general, the miniaturization of devices and costs reduction. At this contemporary world, one cannot imagine life without wireless communications. Practically, our mobile smartphones have become our daily companion which are used for different tasks ranging from writing emails, making both voice and video calls, live program streaming, IOT (internet of things) applications, and endless tasks we could not imagine in the past. The present wireless radios have inevitably off-chip passive components like the SAW filters, Duplexer and high Q filters. These filters are needed to filter out unwanted signals such as large CW (continuous wave) blockers and self-interference signals (or TX leakage) by about 50dB. The fact that recent mobile wireless technologies like LTE and the future 5G propose the adoption of MIMO and carrier aggregation capable of managing multi bands in the system architecture, it implies that the number of antennas, external fixed frequency filters and on-chip building blocks would increase further. Hence, a huge increase in the form factor and cost will result unless some actions are taken. This thesis proposes two innovative self-interference cancellation(SIC) techniques for transceivers while eliminating the use of external SAW filters/ Duplexers. This dissertation compares active and passive SIC techniques where the passive SIC technique has been fully integrated. The concepts, analysis and results are presented. These approaches specifically suppress self-interference while improving the linearity of the receiver with the benefit of low form factor, reduced cost and relaxed linearity requirements for the front-end building blocks. In the concluding part of the thesis, a control loop algorithm is proposed to optimize IIP2 of LNA (in a duplexer/SAW-less receiver suitable for TV white space applications) during process corners and temperature variations.
Abstract Self-Interference Cancellation Techniques for SAW-less Transceivers Saheed A. TIJANI The adoption of mobile wireless communication technologies ranging from GSM to the future 5G radios has continuously required increased data rates and quality of service and, in general, the miniaturization of devices and costs reduction. At this contemporary world, one cannot imagine life without wireless communications. Practically, our mobile smartphones have become our daily companion which are used for different tasks ranging from writing emails, making both voice and video calls, live program streaming, IOT (internet of things) applications, and endless tasks we could not imagine in the past. The present wireless radios have inevitably off-chip passive components like the SAW filters, Duplexer and high Q filters. These filters are needed to filter out unwanted signals such as large CW (continuous wave) blockers and self-interference signals (or TX leakage) by about 50dB. The fact that recent mobile wireless technologies like LTE and the future 5G propose the adoption of MIMO and carrier aggregation capable of managing multi bands in the system architecture, it implies that the number of antennas, external fixed frequency filters and on-chip building blocks would increase further. Hence, a huge increase in the form factor and cost will result unless some actions are taken. This thesis proposes two innovative self-interference cancellation(SIC) techniques for transceivers while eliminating the use of external SAW filters/ Duplexers. This dissertation compares active and passive SIC techniques where the passive SIC technique has been fully integrated. The concepts, analysis and results are presented. These approaches specifically suppress self-interference while improving the linearity of the receiver with the benefit of low form factor, reduced cost and relaxed linearity requirements for the front-end building blocks. In the concluding part of the thesis, a control loop algorithm is proposed to optimize IIP2 of LNA (in a duplexer/SAW-less receiver suitable for TV white space applications) during process corners and temperature variations.
File in questo prodotto:
File Dimensione Formato  
Tijani_PhD_Thesis.pdf

accesso aperto

Descrizione: tesi di dottorato
Dimensione 4.78 MB
Formato Adobe PDF
4.78 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/1214884
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact