Abstract
In this paper, we propose an improved structure for M-dimension(M ⩾ 2) turbo codes using M identical component encoders. The presented structure only applies single recursive convolutional encoder to encode M interleaved versions of information sequence and single tail sequence to operate termination. For the commonly used two-dimension (M = 2) turbo codes, two cascade soft input soft output (SISO) decoders are detailed to decode the corresponding codes. With the two cascade SISO decoders, this coding structure obviously outperforms traditional turbo codes at high code rates, especially, about 0.3 dB gain can be obtained at code rate 0.9 in additive white Gaussian noise channel with quadrature phase shift keying modulation. This makes the proposed coding structure very attractive for future radio communication systems with high throughput requirements.
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