标题: | 60 GHz多载波滤波器组系统之相位杂讯消除与取样频率偏移追踪等化器 Phase Noise Cancellation with Sampling Clock Offset Tracking Equalizer for 60 GHz FBMC System |
作者: | 姚宇诚 Yao, Yu-Cheng 周世杰 刘志尉 Jou, Shyh-Jye Liu, Chih-Wei 电子工程学系 电子研究所 |
关键字: | 多载波滤波器组;60 GHz;取样频率偏移;相位杂讯;FBMC;60 GHz;SCO;Phase Noise |
公开日期: | 2015 |
摘要: | 在本论文中提出了针对 60 GHz 频带应用的三模组基频接收器电路。 我们在 基于 IEEE 802.15.3c 和 IEEE 802.11ad 规格的单一载波和正交分频多工双模式接 收器电路中, 再加上多载波滤波器组模式。 为了满足可适用于 2.64 GHz 的取样 频率, 本文所提之数位基频接收器模组设计采用八倍平行且无反馈的电路设计。 在多载波滤波器组模式的设计中, 为了善用此模式的特点, 我们基于 IEEE 802.15.3c 规格, 修改了原本的频谱规格, 藉此我们可以利用更多的子载波来传送 资料。 在此模式下, 除了原本因射频端的不理想造成的相位杂讯外, 我们还需要 考虑到剩余的取样频偏移对边缘频带子载波的影响。 因此, 我们提出相位杂讯消 除与取样频率偏移等化器来消除这些影响。 所提出的演算法在多载波滤波器组 模式中, 能够在讯号杂讯比为 24 dB 的非可视通道情况下让位元错误率降至10。 与正交分频多工模式比较, 多载波滤波器组模式的效能约低了 4 dB。 而多载波滤 波器组模式的传送效能比正交分频多工模式多出了 52.6%。 所提出的三模组基频接收器电路包含一个全数位同步模组、 多相滤波器模组、 通道等化器、 高吞吐量快速傅立叶转换模组与相位杂讯消除器与取样频率偏移等 化器模组。 在 500 MHz 的操作频率下, 多载波滤波器组模式可以达到 21.4 Gbps 的资料传输率, 高于单一载波模式的 7 Gbps 和正交分频多工模式的 14 Gbps。 而 所提出的相位杂讯消除与取样频率偏移等化器的面积为 645K gate count, 在基频 接收器中所占的比例仅 15% (不包含记忆体), 其中相位杂讯消除器占 9%及取样 频率偏移等化器占了 6%。 In this thesis, the triple-mode baseband receiver system for 60 GHz application is proposed. Base on IEEE 802.15.3c and IEEE 802.11ad specification, we merge filterbank multicarrier (FBMC) system into original dual-mode (SC and HSI) baseband receiver. In order to relax the clock rate, the modules of the design are implemented with 8x-parallelism without feedback tracking loop to meet the 2.64 GHz sampling rate. In the design of FBMC system, we re-define a spectral mask based on IEEE 802.15.3c so that we can utilize the advantages of FBMC system to put as many data subcarriers as we desire. Besides the phase noise caused by the RF non-ideality, we also need to deal with the residual sampling clock offset (SCO) on the band edge subcarriers, which are more severe in extra subcarriers we used in FBMC. Therefore, we propose phase noise cancellation (PNC) with SCO tracking equalizer to deal with both issues. The proposed algorithm can actually improve the performance to 10 BER at 24 dB SNR under NLOS channel in FBMC mode. Compared to OFDM mode, there is 4 dB performance loss due to un-resolvable ISI and ICI. However, the total transmission efficiency in FBMC mode is 152.6% higher than OFDM mode. The proposed baseband receiver is composed by all-digital synchronization, polyphase filter-bank, channel equalizer, high throughput FFT and PNC with SCO tracking equalizer. When working at 500 MHz, the proposed FBMC hardware achieve 21.4 Gbps, which is higher than SC of 7 Gbps and OFDM of 14 Gbps due to the higher bandwidth efficiency and time domain efficiency. The area of the proposed PNC with SCO tracking equalizer is 645K gate count, which is only 15% in baseband receiver excluding memory and 9% for PNC and 6% for SCO tracking design. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT070250239 http://hdl.handle.net/11536/127211 |
显示于类别: | Thesis |