Modal Adaptive Antenna Pseudo-Noise Signal Processing
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Solution Overview
Problem
Classical smart antenna systems for LTE networks are inefficient due to prolonged processing times and complex circuitry, making them difficult to apply in modern mobile communications.
Innovation Solution
A pseudo noise generator is used to optimize signal control in an adaptive antenna array, which adjusts its direction automatically based on input signals, and modal antennas with multiple radiation patterns implement this optimization in a MIMO configuration, utilizing a shared adaptive processor and circuit blocks to streamline signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a classical adaptive processor is used in a smart antenna system, then signal receiving capability is improved, but processing time increases and circuit complexity increases
Solution Approach 1:
The patent replaces the classical adaptive processor (electronic computation system) with a pseudo-noise generator-based system that uses correlation detection. Instead of performing complex adaptive calculations, the system correlates received signals with stored reference signals, dramatically reducing processing time while maintaining signal receiving capability through the mathematical properties of pseudo-noise sequences.
Solution Approach 2:
The patent stores reference signals (copies of transmitted pseudo-noise sequences) in memory for later correlation with received signals. This copying approach allows the receiver to efficiently identify and track transmitted signals by comparing them against known reference patterns, avoiding the need for complex real-time signal processing.
2Reliability
If a classical adaptive processor is used in a smart antenna system, then signal receiving capability is improved, but device complexity increases
Solution Approach 1:
The patent replaces the complex adaptive processor circuitry with a simpler system consisting of a pseudo-noise generator, memory storage, and correlation computation units. This substitution maintains signal receiving capability while dramatically reducing circuit complexity by eliminating the need for complex adaptive weight calculations and control logic.
Solution Approach 2:
The patent extracts the essential function of signal identification from the complex adaptive processor and implements it separately using pseudo-noise correlation. By separating the reference signal generation, storage, and correlation functions into distinct components, the system achieves the same signal receiving capability with significantly reduced overall circuit complexity.
3Adaptability or versatility
If modal antennas with multiple radiation patterns are used, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent uses modal antennas that can dynamically switch between multiple radiation patterns through electrical control of resonant modes. Instead of using mechanically complex multi-element arrays, the system achieves adaptability by electrically tuning the antenna structure to resonate at different modes, each producing a distinct radiation pattern suitable for different spatial configurations.
Solution Approach 2:
The patent implements a single antenna structure that can perform multiple functions by operating in different resonant modes. The same physical antenna structure can generate various radiation patterns (omnidirectional, directional, null-steered) depending on which mode is excited, eliminating the need for multiple separate antenna elements or complex switching networks.
Data Source
AI summary
One or more input signals are used to generate a Pseudo noise generator and re-inject the signal to obtain a more efficient method of control of a receiver using adaptive antenna array technology. The antenna array automatically adjusts its direction to the optimum using information obtained from the input signal by the receiving antenna elements. The input signals may be stored in memory for retrieval, comparison and then used to optimize reception. The difference between the outputs of the memorized signals and the reference signal is used as an error signal. One or multiple Modal antennas, where the Modal antenna is capable of generating several unique radiation patterns, can implement this optimization technique in a MIMO configuration.