OFDM Signal Receiver Interleaving Block Segmentation
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Solution Overview
Problem
Conventional WCDMA systems experience significant processing delay due to interleaving processing, which is exacerbated in systems like LTE with strict delay requirements, as the receiving apparatus cannot perform deinterleaving and decoding until all data in a transmission time interval block is received.
Innovation Solution
An OFDM signal transmitting and receiving apparatus that performs interleaving and deinterleaving processing in units of an interleaving block, which is a part of a transmission time interval block, allowing for partial processing of OFDM signals in each OFDM symbol duration period, thereby reducing overall processing delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interleaving processing is performed in a unit of a transmission time interval block, then the interleaving effect in the time domain is maintained, but the receiving processing delay is significantly increased
Solution Approach 1:
The patent divides the transmission time interval block into multiple interleaving blocks, each of which can be processed independently. This segmentation allows the receiving apparatus to perform deinterleaving and decoding on a per-interleaving block basis rather than waiting for the entire transmission time interval block, thereby reducing processing delay while maintaining the interleaving effect within each block
Solution Approach 2:
The transmitting apparatus performs interleaving processing on data before transmission, organizing it into smaller interleaving blocks that are ready for independent processing. This preliminary organization enables the receiving apparatus to immediately begin deinterleaving operations as soon as each block is received, without waiting for subsequent blocks
2Reliability
If interleaving processing is performed on all data in a transmission time interval block, then error correction capability is improved, but the Round Trip Time in Hybrid Automatic Repeat Request processes is increased
Solution Approach 1:
By segmenting the transmission time interval block into multiple interleaving blocks, the patent enables parallel and independent processing of each block. This reduces the overall Round Trip Time in Hybrid Automatic Repeat Request processes while maintaining error correction capability within each segmented block through interleaving
3Measurement precision
If the receiving apparatus waits to receive all data in a transmission time interval block before performing deinterleaving, then processing accuracy is maintained, but processing speed is reduced
Solution Approach 1:
The patent segments the data into multiple interleaving blocks that can be processed independently. This allows the receiving apparatus to maintain processing accuracy through proper deinterleaving while significantly improving processing speed by not waiting for the entire transmission time interval block to be received
Solution Approach 2:
Instead of waiting for complete data reception before starting processing, the patent enables partial processing of received interleaving blocks. The receiving apparatus can perform deinterleaving and decoding on already-received blocks while continuing to receive remaining blocks, thus improving processing speed without compromising accuracy
Data Source
AI summary
An OFDM signal receiving apparatus (30) includes a receiver section (31) configured to perform receiving processing on a received OFDM signal, for each OFDM symbol duration period; a plurality of deinterleaving sections (341 . . . 34n) each configured to perform deinterleaving processing on data acquired through the receiving processing, in a unit of an interleaving block; and a plurality of decoder sections (361 . . . 36n) each configured to perform decoding processing on data outputted from a corresponding one of the plurality of deinterleaving sections (341 . . . 34n). The interleaving block is a part of a transmission time interval block including data to be transmitted in a transmission time interval.