Integrated Scrambling Code and Preamble Generator for UMTS Baseband
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Solution Overview
Problem
The complexity and inefficiency of producing scrambling codes and preambles in separate devices within a baseband chip for UMTS mobile radio systems lead to increased chip area consumption and additional power and control complexity, particularly due to the need for separate data transmission between a digital signal processor and a transmission modulator.
Innovation Solution
A single apparatus generates scrambling codes and preambles for physical channels like DPDCH, DPCCH, PRACH, and PCPCH, using a common hardware block that shifts the basic scrambling code through 4096 chips, eliminating the need for separate preamble production in the digital signal processor and reducing data transmission requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate devices are used for producing scrambling codes and preambles in the baseband chip, then functional independence and modularity are improved, but device complexity and chip area consumption increase
Solution Approach 1:
The patent combines the scrambling code generation and preamble generation functions into a single integrated apparatus. The scrambling code generator produces both the scrambling codes and the preambles using the same hardware resources, eliminating the need for separate preamble generation devices in the digital signal processor. This merging reduces chip area consumption and overall device complexity while maintaining functional capability.
Solution Approach 2:
The scrambling code generator is designed to perform multiple functions: generating scrambling codes for physical channels and generating preambles for the same channels. This multi-functional approach allows a single device to replace what would traditionally require separate dedicated devices, thereby reducing the overall complexity and area consumption of the baseband chip.
2Adaptability or versatility
If separate devices produce scrambling codes and preambles, then functional modularity is improved, but data transmission requirements and power consumption increase
Solution Approach 1:
By merging the scrambling code and preamble generation into a single apparatus, the patent eliminates the need for additional data transmission between separate digital signal processor and transmission modulator components. This reduces the power consumption associated with data transmission while maintaining the modular functional architecture through software-controlled code generation.
3Ease of manufacture
If separate devices are used for scrambling code and preamble production, then implementation flexibility is improved, but control complexity and data transmission overhead increase
Solution Approach 1:
The patent integrates both code generation functions into one apparatus, reducing control complexity by eliminating the need to coordinate data transmission between separate devices. The single apparatus can generate both scrambling codes and preambles using unified control logic, simplifying the overall control architecture while maintaining implementation flexibility through software programming of the code generation algorithms.
Data Source
AI summary
The present invention is directed to an apparatus for production of scrambling codes that are used for scrambling binary signals transmitted via physical channels in a mobile radio system. The apparatus is also configured to produce preambles that are sent on a physical channel in order to control the access to that particular physical channel. The apparatus includes a scrambling code generator for production of the scrambling codes, and a preamble generator for production of non-scrambled preambles, and at least one multiplier for scrambling the non-scrambled preambles using associated scrambling codes.