Signal Processing Device for 920 MHz Band Receiver Sensitivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The continuous transmission duration is restricted in the 920 MHz band, limiting the receiver sensitivity due to the inability to mount low-frequency phase locked loops or delayed locked loops, resulting in a lower limit on the transfer rate and upper limit on receiver sensitivity compared to systems without such restrictions.
Innovation Solution
A signal processing device and method that rearranges transmission data to uniformly spread predictable portions, modulates the carrier signal phase based on the rearranged data, and transmits the signal, allowing for improved receiver sensitivity by optimizing data transmission within the limited duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the continuous transmission duration is restricted to 4 seconds or less, then the channel allocation can be increased and interference can be reduced, but the receiver sensitivity decreases due to the inability to use low-frequency phase locked loops or delayed locked loops
Solution Approach 1:
The transmission data is segmented into predictable portions and unpredictable portions, which are then spread differently across the transmission frame. This segmentation allows the receiver to use the predictable portions for phase synchronization without requiring long integration periods, thus maintaining receiver sensitivity under short transmission duration constraints.
Solution Approach 2:
The predictable portions of the transmission data are spread uniformly across the entire transmission data before transmission. This preliminary arrangement enables the receiver to perform phase locking and signal integration more effectively within the restricted transmission time, improving receiver sensitivity without extending the transmission duration.
2Measurement precision
If the transfer rate is lowered to increase receiver sensitivity through longer integration periods, then the receiver sensitivity improves, but the transmission duration exceeds the 4 second limit
Solution Approach 1:
By dividing the transmission data into predictable and unpredictable portions and applying different spreading strategies, the system achieves effective signal integration without requiring proportionally longer transmission times. The predictable portions can be processed more efficiently at the receiver side.
Solution Approach 2:
The system changes the distribution pattern of predictable data portions across the transmission frame, spreading them uniformly rather than concentrating them. This parameter change in data arrangement allows for more effective correlation and integration at the receiver, improving sensitivity within the same transmission duration.
3Reliability
If high-performance antennas such as Yagi-Uda antennas are used to improve transmission performance, then the antenna performance improves, but the antenna size increases and structural complexity increases
Solution Approach 1:
The patent replaces reliance on complex mechanical antenna structures with signal processing techniques. By uniformly spreading predictable data portions and optimizing the data arrangement in the frequency domain, the system achieves improved communication reliability without requiring complex physical antenna structures like Yagi-Uda antennas.
Data Source
AI summary
A signal processing method comprising rearranging transmission data so that a predictable portion of the transmission data is spread more uniformly in the transmission data, the predictable portion including information that is predictable by a receiver side. The phase of a carrier signal can be modulated based on the rearranged transmission data, and the modulated signal may be transmitted. The transmitted signal is received by the receiver side. A header position of each frame of the received signal is detected based on the information predictable to the receiver side. Once detected, the frames of the received signal are integrated, and the transmission data is decoded based on the integration. A signal processing device, a transmitter, and/or a receiver may utilizes these methods to transmit, receive, and/or process signals.