A new digital front-end for flexible reception in software defined radio

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• 作者：Isael Diaz^a ; ^{isael.diaz@eit.lth.se" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Chenxin Zhang^a ; ^{chenxin.zhang@eit.lth.se" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Lieven Hollevoet^b ; ^{hollevo@imec.be" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Jim Svensson^c ; ^{jim.svensson@ericsson.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Joachim Rodrigues^a ; ^{joachim.rodrigues@eit.lth.se" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Leif Wilhelmsson^c ; ^{leif.r.wilhelmsson@ericsson.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Thomas Olsson^c ; ^{thomas.p.olsson@ericsson.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Liesbet Van der Perre^b ; ^{vdperre@imec.be" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Viktor Ö ; wall^a ; ^{viktor.owall@eit.lth.se" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Multi-standard ; DFE ; Concurrency ; LTE ; DVB-H ; WLAN
• 刊名：Microprocessors and Microsystems
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：39
• 期：8
• 页码：889-900
• 全文大小：2654 K

文摘

Future mobile terminals are expected to support an ever increasing number of Radio Access Technologies (RAT) concurrently. This imposes a challenge to terminal designers already today. Software Defined Radio (SDR) solutions are a compelling alternative to address this issue in the digital baseband, given its high flexibility and low Non-Recurring Engineering (NRE) cost. However, the challenge still remains in the Digital Front-End (DFE), where many operations are too complex or energy hungry to be implemented as software instructions. Thus, new architectures are needed to feed the SDR digital baseband while keeping complexity and energy consumption at bay. In this article the architecture of a Digital Front-End Receiver (DFE-Rx) for the next-generation mobile terminals is presented. The flexibility needed for multi-standard support is demonstrated by detecting, synchronizing and reporting carrier-frequency offset, of multiple concurrent radio standards. Moreover, the proposed architecture has been fabricated in a 65 nm CMOS low power high-VT cell technology in a die size of 5 mm². The core module of the DFE-Rx, the synchronization engine, has been measured at 1.2 V and reports an average power consumption of 1.9 mW during Wireless Local Area Network (WLAN) reception and 1.6 mW during configuration, while running at 10 MHz.