RF Receiver Architecture for Parallel Channel Demodulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing receiving apparatuses require multiple converters and experience delays in channel selection and image display when processing multiple frequency-multiplexed channels, especially when decoding video data coded by MPEG, due to the need for sequential conversion and processing of radio frequencies to intermediate and then baseband frequencies.
Innovation Solution
A receiving apparatus that converts radio-frequency signals to digital signals and processes them in parallel using a processing unit with band-pass filters and demodulation units, allowing simultaneous processing of multiple channels without the need for multiple converters, and includes software programs and processors to execute these functions efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple converters are used to process multiple channels simultaneously, then channel processing capability is improved, but device complexity increases
Solution Approach 1:
The patent divides the channel processing function into separate modules: a conversion unit that converts radio-frequency signals to digital signals, and a processing unit that contains multiple band-pass filters and demodulation units. Each band-pass filter is assigned to process a specific channel independently, enabling parallel processing of multiple channels while maintaining manageable system complexity through functional segmentation.
2Device complexity
If sequential conversion and processing of radio frequencies to intermediate and baseband frequencies is performed, then processing simplicity is maintained, but channel selection delay increases
Solution Approach 1:
The patent performs preliminary conversion of radio-frequency signals to digital signals in the conversion unit before channel selection. The processing unit then separates different channels from the digital signal and processes them in parallel using multiple band-pass filters and demodulation units. This preliminary action eliminates sequential processing delays while maintaining system simplicity.
Data Source
AI summary
An RF unit receives radio-frequency signals where a plurality of channels are frequency-multiplexed. An A-D unit converts the radio-frequency signals to digital signals. A processing unit processes the plurality of channels contained in the digital signals which have been converted by the A-D unit. The processing unit includes: a band-pass filter, having bands corresponding respectively to the plurality of frequency-multiplexed channels, which separates the digital signals into the plurality of channels; and a demodulation unit which demodulates the plurality of channels separated by the band-pass filter.