Get Here about CDMA technology and How CDMA Works, CDMA Solution and CDMA RF Optimization.
Code Division Multiple Access (CDMA) is a digital cellular technology that allows multiple users to share the same frequency band simultaneously. It operates based on the principle of spread spectrum communication, where each user is assigned a unique code to differentiate their signals. Here is an in-depth explanation of how a CDMA network works: Spread … Read more
Quadrature Phase Shift Keying (QPSK) and 16-Quadrature Amplitude Modulation (16QAM) are both digital modulation schemes used in communication systems to transmit data over radio frequency channels. While they share similarities, there are distinct differences in terms of modulation complexity and data transmission efficiency. Here’s a detailed explanation of how 16QAM differs from QPSK: 1. Basic … Read more
Quadrature Phase Shift Keying (QPSK) is a digital modulation scheme used in communication systems to transmit data over radio frequency channels. Generating a QPSK signal involves modulating digital data onto a carrier wave by manipulating its phase. Here’s a detailed explanation of how to generate a QPSK signal: 1. Digital Data Input: QPSK operates by … Read more
Phase Shift Keying (PSK) is a digital modulation technique used in various communication systems to transmit data by varying the phase of a carrier signal. PSK finds applications in a wide range of systems due to its simplicity, efficiency, and ability to adapt to different communication requirements. Here’s a detailed explanation of the systems where … Read more
4-PSK (4-Phase Shift Keying) and QPSK (Quadrature Phase Shift Keying) are both digital modulation techniques that involve varying the phase of a carrier signal to transmit digital data. While they share some similarities, they are not exactly the same. Let’s delve into the details of both modulation schemes and explore their similarities and differences. 1. … Read more
CDMA (Code Division Multiple Access) is a digital cellular technology that enables multiple users to share the same frequency band simultaneously. While CDMA was once a prevalent technology, its usage has significantly declined in recent years. The main reason for this decline is the widespread adoption of GSM (Global System for Mobile Communications) and its … Read more
What is inside PAGING Channel Message in CDMA The paging channel is the heart of a CDMA base station. All of the parameters and signaling necessary for the proper operation of a CDMA cell site are handled by the paging channel. The paging channel supports a number of distinct messages that provide information and send … Read more
How Frame Formats in CDMA Once the analog voice is compressed by one of the vocoder processes, some additional data is added to produce a frame. Each frame in CDMA is 20 milliseconds regardless of the data rate used. This figure shows all of the possible frame configurations for both the 8 kbps and 13 … Read more
Why Power Control Essential in CDMA ? Power control is essential for the smooth operation of a cdma system. Because all users share the same rf band through the use of pn codes Each user looks like random noise to other users. The power of each individual user therefore, must be carefully controlled so that no … Read more
Forward – Reverse Link Advantages – Disadvantages CDMA The forward link advantages include high transmission power, a pilot channel to provide a timing reference as well as a coherent reference to aid in demodulation, the added time diversity of data bit repetition when transmitting at lower voice data rates, and orthogonal code channel. On the … Read more