Header Block Encoding and Spreading for 60 GHz Reliability
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Solution Overview
Problem
The 60 GHz millimeter wave band experiences high path losses, requiring robust encoding of data structures, particularly the header field, to ensure reliable transmission in applications like wireless high-definition multimedia and high-speed back-haul services.
Innovation Solution
A method involving padding, encoding, reducing, and spreading data blocks, including scrambling with a linear feedback shift register, low-density parity check encoding, and binary phase shift keying modulation, with phase rotation and spreading by a factor of two, to enhance transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If robust encoding is applied to the header field to ensure reliable transmission, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The data structure is divided into a header field and a data field, with different encoding strategies applied to each. The header field undergoes padding, scrambling, and LDPC encoding to ensure robust transmission, while the data field uses simpler encoding. This segmentation allows robust protection where needed without unnecessarily complicating the entire transmission system.
Solution Approach 2:
The header field is preprocessed with padding and scrambling before encoding. Padding adds redundant bits to ensure the header meets minimum length requirements for reliable encoding, while scrambling randomizes the bit pattern to improve encoding performance. These preliminary actions prepare the header for robust LDPC encoding without adding complexity during the actual transmission phase.
2Reliability
If padding is added to enable encoding of the data block, then encoding reliability is improved, but data block size increases
Solution Approach 1:
The padding bits are temporarily added to the header field to enable proper LDPC encoding, then removed after encoding is complete. This extraction approach allows the system to benefit from robust encoding with appropriate block sizes while eliminating the overhead of padding bits from the final transmitted data, thus improving encoding reliability without permanently increasing data block size.
Solution Approach 2:
The padding bits serve a temporary purpose during the encoding process and are discarded after encoding is complete. The receiver, knowing the original header size, can recover the correct data length by removing the corresponding number of padded bits. This discarding and recovering mechanism enables reliable encoding while maintaining efficient data transmission without permanent size increase.
3Reliability
If spreading is applied to the data block, then signal reliability is improved, but transmission time increases
Solution Approach 1:
Spreading is applied selectively only to the encoded header field, not to the entire data structure. The header, which contains critical control information, receives the full spreading treatment to ensure reliable decoding at the receiver. The data field follows without spreading, maintaining original transmission speed. This local application of spreading improves signal reliability for critical information while minimizing impact on overall transmission time.
Data Source
AI summary
Embodiments of the invention relate to a method, apparatus and computer readable storage medium wherein the method comprises; padding a data block of a data structure to enable encoding of the data block; encoding the data block; reducing the size of the encoded data block; and spreading the data block.