3results about How to "Reduce hardware overhead" patented technology

This invention discloses a switchless redundant fault-tolerant memristor cross array circuit for resolving bridging faults, comprising a main array, two redundant word lines, two redundant bit lines, and a controller. The main array consists of N word lines, M bit lines, and cross-point memristor cells. The redundant word lines cross with all bit lines, and the redundant bit lines cross with all word lines. The controller is directly connected to all word lines, redundant word lines, bit lines, and redundant bit lines. This circuit does not contain any physical switches for fault isolation, has a simple structure, low hardware overhead, and is easy to integrate.

The application discloses a low bit error rate antenna based on time reversal, and belongs to the technical field of microwave antennas. In view of the technical pain point that the existing time reversal technology seriously depends on an external multipath environment and the system hardware cost is high, the application designs a kind of center coaxial feed monopole and peripheral high-order mode evanescent wave auxiliary structure. The high-order mode evanescent wave auxiliary structure efficiently extracts the near-field non-radiation evanescent wave and converts it into a propagating wave, actively constructs a high degree of freedom deterministic "pre-scattering" environment at the transmitting end, and completely decouples the dependence on the external random multipath channel from the physical bottom layer. The antenna works in the 2.2GHz-2.6GHz frequency band. Experiments show that, compared with a traditional monopole antenna, the application can significantly reduce the transmission bit error rate by about 30% in a non-line-of-sight rich multipath fading scene. The scheme completely avoids complex feed networks and expensive active T / R components, greatly improves the environmental robustness of the system with extremely low hardware overhead, and provides an innovative physical layer anti-fading new paradigm for high-reliability communication in a complex electromagnetic environment.

The invention discloses a single-bit direction finding method and system for a special non-uniform linear array, relates to the technical field of array signal processing, and aims to solve the problem of direction finding of the special non-uniform linear array under existing impact noise. The method is technically characterized by comprising the following steps of: 1, setting a special non-uniform linear array, acquiring snapshot sampling data of an array receiving signal, and quantifying the signal data; 2, acquiring a fractional low-order matrix of the signal, and reconstructing the fractional low-order matrix of the quantized signal; 3, virtualizing the special non-uniform linear array after quantization reconstruction into a uniform linear array; step 4, decomposing the single-bit subspace; 5, estimating an incoming wave direction angle by using spectrum peak search; the purpose of improving the stability of direction finding and the estimation precision is achieved.