共有 4 个用户进行 CDMA 通信。这 4 个用户的码片序列为: A: (–1 –1 –1 +1 +1 –1 +1 +1) ; B: (–1 –1 +1 –1 +1 +1 +1 –1) C: (–1 +1 –1 +1 +1 +1 –1 –1) ; D: (–1 +1 –1 –1 –1 –1 +1 –1) 现收到码片序列: (–1 +1 –3 +1 –1 –3 +1 +1) 。 则A (发送了1,发送了0,未发送数据),B (发送了1,发送了0,未发送数据), C (发送了1,发送了0,未发送数据),D (发送了1,发送了0,未发送数据)。