Variable-Pulse Symbol Encoding for Extra-Bit Transmission
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Solution Overview
Problem
Existing communication protocols, such as the STEP protocol, face challenges in ensuring a uniform data rate and reliably transmitting additional data like CRC, ECC, or control bits without adding extra symbols, which affects data transmission efficiency.
Innovation Solution
The method involves transmitting an additional bit by using a pulse length longer than the maximum payload data symbol pulse length in the communication protocol, effectively signaling the bit by overwriting one of the payload data symbols, allowing reliable transmission without adding extra symbols to the protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional data bits are transmitted by adding extra symbols to the communication protocol, then the reliability of additional data transmission is improved, but the data transmission efficiency deteriorates
Solution Approach 1:
The patent merges the transmission of additional data bits with the existing payload data symbols by embedding the additional bits within the pulse duration representation of payload symbols. Specifically, the most significant bit (MSB) of each payload symbol is used to carry an additional data bit, while the remaining bits represent the payload data. This combining approach allows reliable transmission of additional data without requiring separate symbols, thereby maintaining data transmission efficiency.
2Productivity
If the data rate is increased by using shorter pulses, then the productivity is improved, but the reliability of data transmission deteriorates
Solution Approach 1:
The patent changes the parameter representation by using pulse duration to encode multiple bits of information. Instead of using fixed-length pulses for binary data, the invention varies the pulse duration to represent multiple bits (including the additional data bit and payload data bits). This parameter change allows efficient use of each symbol period to transmit more information while maintaining reliable detection through the clear distinction between different pulse durations.
Data Source
AI summary
An apparatus for transmitting a bit in addition to a plurality of payload data symbols of a communication protocol is provided. The apparatus comprises an input interface configured to receive information about a bit value of the bit. Further, the apparatus comprises a transmission circuit configured to, if the bit value is a first value, transmit the plurality of payload data symbols at predetermined positions in a data signal as pulses of variable pulse length. The respective pulse length of each of the pulses is selected based on the symbol value of the payload data symbol represented by the respective pulse. If the bit value is a second value, the transmission circuit is configured to transmit a pulse exhibiting a pulse length being longer than a maximum payload data symbol pulse length defined in the communication protocol at the predetermined position of the pulse for the d-th payload data symbol of the plurality of payload data symbols, d=k+i if k+i≤z. d=([k+i] mod z) if k+i>z. k is the symbol value of the i-th payload data symbol of the plurality of payload data symbols, z is the number of possible symbol values of the payload data symbols defined in the communication protocol, and 1≤i≤z.