Non-maximally decimated filter bank-based single-carrier receiver: a pathway to next-generation wideband communication

作者：Chen Xiaofei^*; Harris Fred; Venosa Elettra; Rao Bhaskar D

来源：EURASIP Journal on Advances in Signal Processing, 2014, 2014(1): 62.

DOI：10.1186/1687-6180-2014-62

• Filter bank
• Single-carrier transmission
• Perfect reconstruction
• Non-maximally decimated filter bank
• Synchronization

We present the design of a wideband digital modem based on non-maximally decimated filter bank (NMDFB) with perfect reconstruction (PR) property. The PR-NMDFB contains an analysis filter bank (AFB) and a synthesis filter bank (SFB) whose efficient polyphase forms are named as polyphase analysis channelizer (PAC) and polyphase synthesis channelizer (PSC). The waveform being processed is the legacy square root Nyquist-shaped quadrature amplitude modulation (QAM). In contrast to orthogonal frequency division multiplexing (OFDM) systems, the shaped QAM transmission has much superior performance properties in throughput, peak-to-average power ratio (PAPR), and synchronization. We will show the PR-NMDFB is capable of efficiently performing several key tasks of a digital receiver with dramatic workload reduction. This includes digital filtering, carrier recovery, and symbol timing recovery. Moreover, the nature of NMDFB allows the signal processing to operate a significantly reduced sample rate, which is a desired characteristic for replacing current FIR implementation in wideband systems.

• 出版日期2014-5-8