Parallel N-Path Multiband Filter for Non-Contiguous Carrier Aggregation
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Solution Overview
Problem
In mobile wireless communication systems, using multiple cellular receivers for multiband signal reception leads to costly, bulky, and power-inefficient systems, especially when handling non-contiguous carrier aggregation signals and interfering signals.
Innovation Solution
The implementation of multiple N-path filters configured in parallel, clocked by a common frequency, with adjustable bandwidths and a combiner to suppress interfering signals while passing signals of interest, allowing for efficient multi-band filtering and carrier aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple cellular receivers are used for multiband signal reception, then signal reception capability is improved, but system cost, size, and power consumption increase
Solution Approach 1:
The patent combines multiple filtering functions into a single N-path filter structure that processes multiple carrier aggregation signals simultaneously. The filter uses parallel signal paths with different tuning parameters to handle non-contiguous frequency bands, eliminating the need for separate receivers while maintaining multiband capability.
Solution Approach 2:
The N-path filter is designed as a universal filtering structure that can process multiple frequency bands and carrier aggregation configurations through a single device. By adjusting tuning parameters and clock frequencies, the same filter structure handles different signal scenarios, making the receiver system more versatile without adding complexity.
2Adaptability or versatility
If multiple cellular receivers are used for multiband signal reception, then signal reception capability is improved, but power consumption increases
Solution Approach 1:
The patent merges multiple receiver functions into a single N-path filter architecture that processes multiple carrier aggregation signals in parallel paths. This consolidation reduces the total number of active components and power-consuming elements while maintaining the ability to receive signals across multiple frequency bands simultaneously.
3Object-affected harmful factors
If traditional filtering methods are used for non-contiguous carrier aggregation, then interfering signals are suppressed, but desired signals are also attenuated
Solution Approach 1:
The N-path filter divides the signal processing into multiple parallel paths, each tuned to different frequency characteristics. This segmentation allows the filter to selectively pass different frequency components through different paths, then recombine them to achieve both interfering signal suppression and desired signal preservation that cannot be accomplished with a single traditional filter.
Solution Approach 2:
The filter employs dynamic tuning mechanisms where clock frequencies and tuning parameters can be adjusted based on the specific carrier aggregation configuration. This dynamic adaptation allows the filter to optimize its response for different signal scenarios, maintaining high selectivity for desired signals while suppressing interferers across non-contiguous frequency bands.
Data Source
AI summary
Methods and apparatus, including computer program products, are provided for receivers. In one aspect there is provided an apparatus. In some example embodiments, there is provided an apparatus. The apparatus may include a first N-path filter configured with at least a first passband, wherein the first N-path filter is coupled to a radio frequency input port providing at least a first carrier aggregation signal, a second carrier aggregation signal, and an interfering signal; a second N-path filter configured with at least a second passband, wherein the second N-path filter is coupled to the radio frequency input port providing at least the first carrier aggregation signal, the second carrier aggregation signal, and the interfering signal; and a combiner configured to subtract a first output of the first N-path filter from a second output of the second N-path filter. Related apparatus, systems, methods, and articles are also described.