Quantum-dot cellular automata (QCA) are a prospective nanotechnology with striking performance for complementing complementary metal oxide semiconductor (CMOS) based integrated circuit technique. For applications in communications, serial concatenated convolutional codes (SCCCs) have been investigated due to their negligible error floor for deep space communication. Using a combination of top-down and bottom-up approaches, we design and implement an SCCC encoder in QCA technology. In this work, a Bose–Chaudhuri–Hocquenghem (BCH) code encoder with the ability for correcting burst errors, a pseudo random interleaver for permuting signal bits, and a convolutional code encoder for correcting random errors are logically connected in series for composing the SCCC encoder. Specifically, inspired by the idea for a divider design, a layout for (n, k, t) BCH code encoders is proposed and implemented with QCA cells. For using the four-phase clock mechanism, we also devise the serial-to-parallel and parallel-to-serial converters for constructing the interleaver. In addition, (u, f, K) convolutional code encoders with various constraint lengths are designed as well. The functionalities and validity of the proposed circuit design are verified by using QCADesigner.

量子点细胞自动机（QCA）是一种具有惊人性能的前瞻性纳米技术，可用于补充基于互补金属氧化物半导体（CMOS）的集成电路技术。对于通信中的应用，已经研究了串行级联卷积码（SCCC），因为其深空通信的错误底限可以忽略不计。通过结合使用自上而下和自下而上的方法，我们在QCA技术中设计并实现了SCCC编码器。在这项工作中，逻辑上串联了一个具有纠错能力的Bose-Chaudhuri-Hocquenghem（BCH）代码编码器，一个用于置换信号位的伪随机交织器和一个用于校正随机错误的卷积代码编码器，以构成SCCC编码器。具体来说，受到分隔器设计思想的启发，提出并利用QCA单元实现n，k，t）BCH码编码器。为了使用四相时钟机制，我们还设计了串行到并行和并行到串行转换器来构造交织器。另外，还设计了具有各种约束长度的（u，f，K）卷积码编码器。通过使用QCADesigner验证了所提出的电路设计的功能和有效性。